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Please read BHL's Acknowledgment of Harmful Content
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  1. By: French, Norman H. - Shunk, Albert H. - United States. Bureau of Land Management.
    Publication info: [Washington, D.C.?], U.S. Department of the Interior, Bureau of Land Management, 1952
    Holding Institution: Bureau of Land Management
    Subjects: Environmental monitoring  Methodology  Photography in environmental monitoring  Photography in range management  Range management  Rangeland health