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  • The Evolution of the Conservation Movement, 1850-1920
    The collection documents the historical formation and cultural foundations of the movement to conserve and protect America's natural heritage. It consists of 60 books and pamphlets, 140 Federal statutes and Congressional resolutions, 34 additional legislative documents, excerpts from the Congressional Globe and the Congressional Record, 360 Presidential proclamations, 170 prints and photographs, 2 historic manuscripts, and a two-part motion picture.