Tác giả
Sabin Americana, 1500-1926
159
R.L. Polk & Co
43
Illinois Federation of Women's Clubs
11
United States. Food and Drug Administration
10
Pennsylvania. Department of Education
7
American Historical Periodicals
6
Bucknell University
6
Center for Food Safety and Applied Nutrition (U.S.)
6
Hoig, Harriet M.
6
United States. Agricultural Marketing Service. Dairy Programs
6
Defense Logistics Services Center (U.S.)
5
Livingston, John
5
Pennsylvania. Central Management Information Center
5
ProQuest Information and Learning Company
5
Securities Research Company (Boston, Mass.)
5
Standard and Poor's Corporation
5
United States. Agricultural Marketing Service. Dairy Division
5
United States. Animal and Plant Health Inspection Service
5
United States. Animal and Plant Health Inspection Service. Veterinary Services
5
United States. Biotechnology, Biologics, and Environmental Protection
5
EBSCO Publishing (Firm)
4
Thomson Financial Publishing
4
Tōyō Keizai Shinpōsha
4
United States. Coast Guard
4
United States. Environmental Protection Agency. Office of Administration and Resources Management
4
United States. Food Safety and Quality Service. Poultry and Dairy Quality Division
4
American Foundation for AIDS Research
3
American Medical Association
3
American Psychological Association
3
Association of Psychology Postdoctoral and Internship Centers (U.S.)
3
Blytmann International
3
Diffenbacher, J. F.
3
Gale Research Company
3
Gerritsen collection of women's history online
3
Graduate Group (U.S.)
3
Hawes, George W.
3
International Environmental Information System (United Nations Environment Programme)
3
Maclear & Co
3
Maritime Law Association of the United States
3
Missionary Research Library (New York, N.Y.)
3
Modern Language Association of America
3
National Institutes of Health (U.S.)
3
Pennsylvania. Department of State
3
Pennsylvania. State Board of Nurse Examiners
3
Standard Rate & Data Service
3
Temple University. Libraries. Urban Archives. Pamphlet Collection
3
United Nations Environment Programme
3
United States. Area Redevelopment Administration
3
United States. Department of State
3
United States. Federal Aviation Administration
3
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