The first exposition of conservation and its builders; an official history of the National conservation exposition, held at Knoxville, Tenn., in 1913 and of its forerunners, the Appalachian expositions of 1910-11, embracing a review of the conservation movement in the United States from its inception to the present time
Don Carlos Ellis, William M Goodman, Pinchot, Gifford, 1865-1946, Lathrop, Julia Clifford, 1858-1932
