Author/Creator
- Poppe, Lawrence J.7
- Stone, Janet Radway7
- Butman, Bradford6
- Hayes, Gavin P.6
- Puerto Rico Aqueduct and Sewer Authority6
- United States. Bureau of the Census. Geography Division6
- United States. National Park Service6
- Allen, John Logan, 1941-5
- Hansen, Cristi V.5
- Massachusetts. Office of the State Geologist5
- Rhea, Susan5
- United States. Soil Conservation Service5
- Wichita (Kan.)5
- DiGiacomo-Cohen, Mary L.4
- Finn, Thomas M.4
- Massachusetts. Executive Office of Environmental Affairs4
- Massachusetts. Geological Survey4
- Paṇḍyā, Alpā Kauśika4
- Puerto Rico Electric Power Authority4
- Benz, Harley M. (Harley Mitchell)3