Book Review: John Elder. Pilgrimage to Vallombrosa: From Vermont to Italy in the Footsteps of George Perkins Marsh. Charlottesville and London: University of Virginia Press,2006

Marsh, G.P. (2003). Man and nature; or, physical geography as modified by human action (Ed. David Lowenthal ). Seattle: University of Washington Press.

Mumford, L. (1931). The brown decades: A study of the arts in America, 1865-1895. New York: Harcourt Brace .

Nash, R. (1967). Wilderness and the American mind. New Haven, CT: Yale University Press.