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Subjects
- Rabies -- mortality1
- Railroads1
- Ray, Isaac, 1807-1881.1
- Records1
- Recreation2
- Referral and Consultation1
- Relief Work2
- Religion1
- Religion and Medicine1
- Residential Facilities -- organization & administration1
- Respiratory Therapy1
- Respiratory Tract Diseases -- veterinary1
- Rest1
- Resuscitation1
- Rhoads, Edward, 1841-1871.1
- Rittenhouse, David, 1732-1796.1
- Rivers2
- Rogers, James B., 1803-1852.1
- Ruan, John, 1771-1845.1
- Rush, Benjamin, 1746-1813.3