Author/Creator
- United States. Soil Conservation Service1,874
- Geological Survey (U.S.)553
- United States. Natural Resources Conservation Service438
- United States. Forest Service401
- United States. National Park Service248
- United States. Bureau of Land Management239
- Texas Agricultural Experiment Station159
- U.S. Fish and Wildlife Service127
- United States. Bureau of the Census123
- University of Illinois at Urbana-Champaign. Agricultural Experiment Station92
- Kansas Agricultural Experiment Station87
- Purdue University. Agricultural Experiment Station71
- University of Missouri--Columbia. Agricultural Experiment Station71
- Kentucky Agricultural Experiment Station68
- Ohio Agricultural Research and Development Center64
- United States. Bureau of Indian Affairs64
- Louisiana Agricultural Experiment Station56
- South Dakota Agricultural Experiment Station56
- University of Nebraska--Lincoln. Conservation and Survey Division56
- Iowa Agriculture and Home Economics Experiment Station53