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1
por Hourdequin, Marion
Fort Collins, CO : U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Research Station, 2001

Government Document Libro
2
por Crawford, Richard L.
Beltsville, Md. : U.S. Dept. of Agriculture, Agricultural Research Service, National Agricultural Library, Animal Welfare Information Center, 2006

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Government Document Libro
3
por Doescher, Rex A.
Washington : Smithsonian Institution Press, 1981

Government Document Libro
4
por Hessl, Amy
Washington, D.C. : [Springfield, Va.] : U.S. Dept. of the Interior, National Biological Service ; [National Technical Information Service, distributor], 1995

Government Document Libro
5
por Domning, Daryl P.
Washington, D.C. : Smithsonian Institution Press, 1996

Government Document Libro
6
[Reston, VA] : U.S. Geological Survey, 1999

Government Document Libro
7
por Barlow, Paul M.
Northborough, Mass. : Denver, CO : U.S. Dept. of the Interior, U.S. Geological Survey ; Branch of Information Services [distributor], 2002

Government Document Libro
9
Atlanta, Ga. : Dept. of Health & Human Services, Public Health Service, Centers for Disease Control, Center for Health Promotion and Education, 1981

Government Document Libro
10
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2002

Government Document Libro
11
Reston, Va. : Denver, CO : U.S. Dept. of the Interior, U.S. Geological Survey ; USGS Information Services [distributor], 2002

Government Document Libro
12
[Bethesda, Md.] : Dept. of Health and Human Services, National Institutes of Health, National Institute on Aging, 2003

Government Document Libro
13
por Gluckstein, Fritz P.
Bethesda, Md. : Reference Services Division, National Library of Medicine, U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health, 1985

Government Document Libro
14
Washington, D.C. : United States Government Printing Office, 1987

Government Document Libro
15
por Anglin, Donald R.
Vancouver, Wash. : U.S. Dept. of the Interior, Fish and Wildlife Service, Lower Columbia River Fishery Resource Office, 1993

Government Document Libro
16
por Anastos, George
[Washington] U.S. Public Health Service, 1957

Government Document Libro
17
por Smith, Cynthia Petrie
Beltsville, Md. : National Agricultural Library, 1991

Government Document Libro
18
Washington, U.S. Govt. Print. Off., 1947

Government Document Libro