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Author/Creator
- United States67
- United States. Federal Aviation Administration33
- United States. Administration on Aging29
- National Agricultural Library (U.S.)23
- United States. Office of Educational Research and Improvement22
- U.S. and Foreign Commercial Service20
- Corporation for National Service (U.S.)16
- Eisenhower National Clearinghouse for Mathematics and Science Education16
- United States. Post Office Department16
- Damron, Bob15
- National Center for Health Statistics (U.S.)14
- United States. Forest Service14
- United States. National Park Service14
- Foundation Center13
- United States. Environmental Protection Agency13
- United States. Law Enforcement Assistance Administration13
- United States. Office of Education13
- National Institutes of Health (U.S.)12
- United States. Internal Revenue Service12
- Melton, J. Gordon11