1. Wyant, W. K. (1982). Westward in Eden. The Public Lands and the Conservation Movement. Berkeley, University of California Press.
2. Wrobel, D. M. (1996b) ‘New Western History’, in Encyclopedia of the American West, vol. III: pp. 1191–4.
3. Beyond the Frontier-Region Dichotomy
4. Wrobel, D. M. (1993). The End of American Exceptionalism. Frontier Anxiety from the Old West to the New Deal. Lawrence, University Press of Kansas.
5. Wunder, J. R. (1988). Historians of the American Frontier. A Bio-Bibliographical Source Book. Westport, Greenwood Press.