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Author/Creator
- Geological Survey (U.S.)174
- Harmon, Robert B. (Robert Bartlett), 1932-47
- White, Anthony G.44
- Goehlert, Robert, 1948-40
- Coppa & Avery Consultants38
- Sharma, Prakash C.36
- Swanick, Eric L.36
- Worsham, John P.36
- Vance, Mary A.35
- Food and Agriculture Organization of the United Nations28
- Chin, Felix, 1937-27
- United States27
- Food and Agriculture Organization of the United Nations. Documentation Center25
- National Agricultural Library (U.S.)21
- Air Pollution Technical Information Center20
- Eister, Margaret F.20
- Jillson, Willard Rouse, 1890-197518
- Library of Congress. Division of Bibliography18
- Martin, Carol Ann18
- Moe, Christine18