The Mather Mountain Party of 1915 and the founding of the National Park Service /

by Albright, Horace M (Horace Marden), 1890-1987, Schenck, Marian Albright, 1921-, Tweed, William C.
Published 2014

The United States Civilian Conservation Corps of the 1930's /

by Hayden, Ernest A., 1905-
Published 1985