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- Washington Post Company230
- Genetics Society of America45
- American Society for Microbiology42
- American Association for the Advancement of Science35
- National Academy of Sciences (U.S.)22
- United States. Government Printing Office22
- The Academic Press19
- ISI Press12
- New York Academy of Sciences12
- National Academy Press (U.S.)11
- New York Times Company11
- Advanced Computer for Medical Research10
- John Wiley & Sons10
- MacMillan Magazines10
- McGraw-Hill Companies9
- American Medical Association7
- Undetermined6
- Elsevier Science Publishers5
- Stanford Medical Alumni Association5
- American Chemical Society4