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  1. By: National Plant Materials Center (U.S.)
    Publication info: Beltsville, Maryland, United States Department of Agriculture, NRCS, January 2006
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: National Plant Materials Center (U.S.)  Plant conservation  Plant materials centers  United States  
    BHL Collections: Seed & Nursery Catalogs
  2. By: United States. Soil Conservation Service.
    Publication info: [Beltsville, Maryland?], [publisher not identified], [1958]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Botanical specimens  Collection and preservation  Congresses  Development  Plant introduction  Plant materials centers  Seed technology  Seeds  United States  
  3. By: Thornburg, Ashley A. - United States. Soil Conservation Service.
    Publication info: Washington, D.C, Soil Conservation Service : for sale by the Supt. of Docs., U.S. G.P.O, 1982
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Arid regions  Plant introduction  Plant materials centers  Soil conservation