OpenStax
Open Stax: American Foreign Policy 1890 1914: Turner, Mahan, and Roots of Empire
Examines the development of American foreign policy in the latter part of the 1800s, and what Frederick Jackson Turner and Alfred Thayer Mahan did to further American imperialistic interests.
Internet History Sourcebooks Project
Fordham University: Modern History Sourcebook: Frederick Jackson Turner
This site from the Fordham University contains the introductory text of "The Significance of the Frontier in American History, 1893" by Frederick Jackson Turner.
PBS
Pbs: The West: Frederick Jackson Turner (1861 1932)
This PBS website provides a brief biographical sketch of Frederick Jackson Turner, and an overview of his theory regarding the significance of the American western frontier as the defining experience in the development of the American...