"1949" . "The Turner Thesis, concerning the role of the frontier in American history" . . . "The Turner Thesis, concerning the role of the frontier in American history" . . . . . "Pionniers -- \u00C9tats-Unis" . . . . . "Turner, Frederick Jackson, 1861-1932. Frontier in American history" . "Turner, Frederick Jackson (1861-1932) " . . "Expansion territoriale -- \u00C9tats-Unis" . . "Civilisation -- \u00C9tats-Unis" . "\u00C9tats-Unis (ouest) -- Histoire" . . "Text" . "Turner, Hypoth\u00E8se de" . . "Frontier thesis" . . "\u00C9tats-Unis -- Histoire" . "Fronti\u00E8res -- \u00C9tats-Unis" .