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  1. By: Kreger, Michael D. - Animal Welfare Information Center (U.S.)
    Publication info: Beltsville, MD (10301 Baltimore Ave., Beltsville 20705), U.S. Dept. of Agriculture, Agricultural Research Service, National Agricultural Library, Animal Welfare Information Center, [1999]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Bibliography  Catalogs  Environmental enrichment  Environmental enrichment (Animal culture)  Internet resource  National Agricultural Library (U.S.)  Primates  
  2. By: Adams, Kristina M. - Animal Welfare Information Center (U.S.)
    Publication info: Beltsville, Md, U.S. Dept. of Agriculture, Agricultural Research Service, National Agricultural Library, Animal Welfare Information Center, [2006]-
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Bibliography  Environmental enrichment  Environmental enrichment (Animal culture)  Internet resource  Primates