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- Odontological Society of Pennsylvania, author.1
- Oehme, F. G. (Ferdinand Gustav), 1826-3
- Oettinger, B. (Bernard), author1
- Ogden, J. B. (Jay Bergen), 1868-1927, author1
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- Ohio State Sanitary Association. Annual Meeting 1885 : Columbus, Ohio) author.1
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- Ohio. State Board of Health, author.2
- Ohio. State Board of Health, compiler.1
- Ohio. State Board of Health.1
- Ohio. State Board of Medical Examiners, author.1
- Ohlemann, F. W. Max, author1