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  1. By: United States. Committee on Conservation of Natural Resources. - United States. Congress. Senate. Committee on Conservation of Natural Resources. - United States. 61st Cong., 2d sess., 1909-1910. Senate. - United States. Congress (61st, 2nd session : 1909-1910)
    Publication info: Washington,Govt. Print. Off.,1910.
    Holding Institution: Library of Congress