Allen, John Logan "Geographical Knowledge and American Images of the Louisiana Territory." In Voyages of Discovery: Essays on the Lewis and Clark Expedition, edited by James P. Ronda. 39–58. Helena: Montana Historical Society Press, 1998.
———. "Imagining the West: The View from Monticello." In Thomas Jefferson and the Changing West, edited by James P. Ronda, 3–23. Albuquerque: University of New Mexico Press, 1997.
———. Passage Through the Garden; Lewis and Clark and the Image of the American Northwest. Urbana: University of Illinois Press, 1975. Reprint, Lewis and Clark and the Image of the American Northwest, Mineola, NY: Dover, 1998.
———. "The Maps of the Lewis and Clark Expedition." In Mapping the West: America's Westward Movement, 1524–1890, edited by Paul E. Cohen, 74–96. New York: Rizzoli, 2002.
Alvord, Clarence Walworth. The First Explorations of the Trans-Allegheny Region by the Virginians, 1650–1674. Cleveland: Arthur H. Clark, 1912.
Arnow, Harriette Louisa Simpson. Seedtime on the Cumberland. Lincoln, NE: University of Nebraska Press, 1995.
———. Flowering of the Cumberland. Lincoln: University of Nebraska Press, 1996.
Benson, Guy Meriwether, and University of Virginia. Lewis and Clark: The Maps of Exploration, 1507–1814. Charlottesville, Va: Howell Press, 2002.
Boorstin, Daniel J. The Lost World of Thomas Jefferson. Boston: Beacon Press, 1960.
Bowman, Forest J. "A Troublesome and Difficult Affair Surveying the Fairfax Line." West Virginia History. 33.3 (1972): 248–261.
Brown, Ralph M. "A Sketch of the Early History of South-Western Virginia." William and Mary College Quarterly Historical Magazine. 17.4 (1937): 501–513.
Burns, Annie Walker. Daniel Boone's Predecessor in Kentucky, Who Was Dr. Thomas Walker of Albemarle County Virginia. 2d ed., with additions, Washington, D.C.: 1962a.
Burns, David M. Gateway: Dr. Thomas Walker and the Opening of Kentucky. 1st ed, Middlesboro, Ky: Bell County (Kentucky) Historical Society, 2000b.
Chinard, Gilbert. "Jefferson and the American Philosophical Society." Proceedings of the American Philosophical Society. 87.3, Bicentennial of Thomas Jefferson (1943): 263–276.
Clark, George Rogers. George Rogers Clark Papers, 1771–. Springfield, Ill: Trustees of the Illinois State Historical Library, 1912.
Cohen, Paul E. Mapping the West: America's Westward Movement 1524–1890. New York: Rizzoli, 2002.
Cotterill, Robert S. "The Virginia-Chickasaw Treaty of 1783." The Journal of Southern History. 8.4 (1942): 483–496.
Cresswell, Donald H. "Colony to Commonwealth." In Virginia in Maps: Four Centuries of Settlement, Growth, and Development, edited by Richard W. Stephenson and Marianne M. McKee, 47–61. Richmond: The Library of Virginia, 2000.
Davis, Richard Beale. Intellectual Life in Jefferson's Virginia, 1790–1830. Chapel Hill: University of North Carolina Press, 1964.
Draper, Lyman. The Life of Daniel Boone. Edited by Ted Franklin Belue. Mechanicsburg, PA: Stackpole Books, 1998.
Fischer, David Hackett, and James C. Kelly. Bound Away: Virginia and the Westward Movement. Charlottesville: University Press of Virginia, 2000.
Fraser, Kathryn M. "Fort Jefferson: George Rogers Clark's Fort at the Mouth of the Ohio River, 1780–1781." Register of the Kentucky Historical Society. 81.1 (1983): 1–24.
Hawke, David Freeman. "William Clark and the Mapping of the West." Gateway Heritage. 10.3 (1989): 4–13.
Henderson, Archibald. "Dr. Thomas Walker and the Loyal Company of Virginia." Proceedings of the American Antiquarian Society. 41 (1932): 77–178.
Hindle, Brooke. The Pursuit of Science in Revolutionary America, 1735–1789. Chapel Hill: Published for the Institute of Early American History and Culture, Williamsburg, Va. by University of North Carolina Press, 1956.
Hoffmann, John. "Queries Regarding the Western Rivers: An Unpublished Letter From Thomas Jefferson to the Geographer of the United States." Journal of the Illinois State Historical Society. 75 (1982): 15–28.
Jackson, Donald Dean. Letters of the Lewis and Clark Expedition, with Related Documents, 1783–1854. 2d ed, Urbana: University of Illinois Press, 1978.
———. Thomas Jefferson & the Stony Mountains: Exploring the West from Monticello. Urbana: University of Illinois Press, 1981; Norman: University of Oklahoma Press: 1993. Reprint, Thomas Jefferson & the Rocky Mountains: Exploring the West from Monticello. Norman: University of Oklahoma Press, 2002.
———. "Washington, Jefferson, and the American West." Carroll Lecture, Mary Baldwin College, Staunton, VA, November 9, 1976.
Jefferson, Thomas. Notes on the State of Virginia. Charlottesville: University of Virginia, 1993. http://etext.virginia.edu/toc/modeng/public/JefVirg.html (accessed December 5, 2006).
Kastor, Peter J. The Nation's Crucible: The Louisiana Purchase and the Creation of America. New Haven: Yale University Press, 2004.
Klinefelter, Walter. "Lewis Evans and His Maps." Transactions of the American Philosophical Society. 61.7 (1971): 3–65.
Lewis, Anthony Marc. "Jefferson and Virginia's Pioneers, 1774–1781." The Mississippi Valley Historical Review. 34.4: 551–588.
Merrill, Peterson D. Thomas Jefferson and the New Nation. New York: Oxford University Press, 1970.
Nasatir, Abraham Phineas, ed. Before Lewis and Clark: Documents Illustrating the History of the Missouri, 1785-1804. Lincoln: University of Nebraska Press, 1990.
Nobles, Gregory H. "Straight Lines and Stability: Mapping the Political Order of the Anglo-American Frontier." The Journal of American History. 80.1 (1993): 9–35.
Onuf, Peter S. Statehood and Union: A History of the Northwest Ordinance. Bloomington: Indiana University Press, 1987.
———. Jefferson's Empire: The Language of American Nationhood. Charlottesville: University Press of Virginia, 2000.
Ronda, James P. Finding the West: Explorations with Lewis and Clark. 1st ed, Albuquerque: University of New Mexico Press, 2001.
———, ed. Thomas Jefferson and the Changing West: From Conquest To Conservation. St. Louis: Missouri Historical Society Press, 1997.
———, ed. Voyages of Discovery: Essays on the Lewis and Clark Expedition. Helena: Montana Historical Society Press, 1998.
Sanchez-Saavedra, E. M. "Colonial Expansion: The Joshua Fry-Peter Jefferson Map, 1751-1794." In A Description of the Country: Virginia's Cartographers and Their Maps, 1607-1881, 25–34. Richmond: Virginia State Library, 1975.
Stephenson, Richard W. and Marianne M. McKee, ed. Virginia in Maps: Four Centuries of Settlement, Growth, and Development. Richmond: The Library of Virginia, 2000.
Tobin-Schlesinger, Kathleen. "Jefferson to Lewis: The Study of Nature in the West." Journal of the West. 29.1 (1990): 54–61.
Verner, Coolie. "The Fry and Jefferson Map." Imago Mundi. 21 (1967): 70–94.
Wellford, Harry. "Dr. Thomas Walker, His Uncelebrated Impact on Early Tennessee." Tennessee Historical Quarterly. 34.2 (1975): 130–144.
———. "The Virginia-Tennessee Boundary: The Walker Line?" Tennessee Historical Quarterly. 62.2 (2003): 110–129.