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Subjects
- Rabbits2
- Rana temporaria -- embryology1
- Ranidae7
- Ranidae -- physiology1
- Refraction, Ocular1
- Refractive Errors1
- Relapsing Fever -- epidemiology1
- Reproductive Behavior -- physiology1
- Retina2
- Retina -- anatomy & histology2
- Retina -- growth & development1
- Retina -- physiology3
- Rhombencephalon1
- Rulloff, Edward H. (Edward Howard), 1819-1871.1
