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Authors
- Obstetrical Society of Philadelphia.1
- Ocampo, Ignacio.1
- Ochsner, Albert J. (Albert John), 1858-19251
- Ochsner, Albert J. (Albert John), 1858-1925 author9
- Octerlony, John A. (John Arvid), 1838-19051
- Octerlony, John A. (John Arvid), 1838-1905 author2
- Odell, Frederick S., author1
- Odicini, B. (Bartolomé) author1
- 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
- Oglesby, Richard J. (Richard James), 1824-1899 author1
- Ogston, Francis, 1803-1887 author1
- Ohio State Medical Society. Clark County Branch.1
- Ohio State Sanitary Association. Annual Meeting 1885 : Columbus, Ohio) author.1
- Ohio.1
- Ohio. Commissioners to Investigate the Massachusetts Cattle Disease.1
- Ohio. State Board of Health, author.2
- Ohio. State Board of Health, compiler, issuing body.1