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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Conservation Foundation. Audio-Visual Center.
    Edition: [3d ed.
    Publication info: Flanders, N.J, O'Hare Books], 1967
    Holding Institution: Prelinger Library
    Subjects: Conservation of natural resources  Film catalogs  Nonrenewable natural resources  Renewable natural resources  United States  
  2. By: Northern Plains Governors' Conference Rapid City, S.D.) - United States. Forest Service. - Nebraska National Forest (Neb. and S.D.)
    Publication info: Washington, D.C.?, U.S. Forest Service, 1993
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Collection and preservation  Congresses  Cultural property  Fossils  Nonrenewable natural resources  Protection  United States  Vertebrates, Fossil