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Author/Creator
- United States33
- United States. Department of Agriculture. Economic Research Service17
- United States. Environmental Protection Agency. Office of Research and Development16
- United States. Environmental Protection Agency. Prevention, Pesticides, and Toxic Substances14
- U.S. Fish and Wildlife Service13
- United States. Department of Agriculture. Natural Resource Economics Division13
- United States. Environmental Protection Agency10
- Environmental Research Laboratory (Athens, Ga.)9
- Eisler, Ronald, 1932-8
- Pesticide Action Network (Group). Asia and the Pacific6
- United States. Environmental Protection Agency. Office of Pesticides and Toxic Substances6
- Geological Survey (U.S.)5
- Midwest Research Institute (Kansas City, Mo.)5
- United States. Extension Service5
- Corvallis Environmental Research Laboratory4
- Ferguson, Walter L.4
- Municipal Environmental Research Laboratory4
- Osteen, Craig D.4
- Parks, John R. (John Rabon), 1908-4
- Risk Reduction Engineering Laboratory (U.S.)4