Author/Creator
- ebrary, Inc241
- United States194
- Project Muse175
- SpringerLink (Online service)102
- National Center for Education Statistics98
- Films for the Humanities & Sciences (Firm)90
- Infobase90
- National Assessment of Educational Progress (Project)89
- American Bar Association. Section of Legal Education and Admissions to the Bar65
- United States. National Highway Traffic Safety Administration65
- ProQuest (Firm)64
- Temple University. Center for Social Policy and Community Development57
- United States. General Accounting Office56
- United States. Office of Educational Research and Improvement56
- Reese, Clyde M.54
- United States. Administration on Aging54
- United States. Department of Housing and Urban Development. Office of Policy Development and Research49
- United States. Department of Education48
- United States. Congress. House. Committee on Science45
- United States. Federal Emergency Management Agency44