Author/Creator
- Geological Survey (U.S.)163
- United States80
- United States. Bureau of the Census62
- United States. Bureau of Labor Statistics47
- United States. National Park Service39
- Cornell University. Agricultural Experiment Station37
- United States. Soil Conservation Service36
- New York (State). Dept. of Environmental Conservation30
- National Institute for Occupational Safety and Health23
- Nassau County (N.Y.). Dept. of Public Works22
- U.S. Fish and Wildlife Service22
- Miller, Todd S.16
- National Institute of Justice (U.S.)14
- Kappel, William M.13
- United States. Bureau of Labor Statistics. Middle Atlantic Region12
- Olmsted Center for Landscape Preservation (U.S.)11
- Reynolds, Richard J.11
- United States. Congress. Senate. Committee on Banking, Housing, and Urban Affairs11
- United States. Army. Corps of Engineers10
- United States. Congress. House. Select Committee on Narcotics Abuse and Control10