Encyclopedias, Almanacs, Transcripts, and Maps
- Refsum disease
- Regang
- Reginald Aubrey Fessenden
- Reginald Crundall Punnett
- Reginald Huber Fitz
- Regnier de Graaf
- Regnier Gemma Frisius
- Regulation and Regulatory Agencies
- Regulations on Criteria for Medical Ethics and their Implementation
- Regulatory Toxicology
- Rehabilitation Medicine
- Reichenbach, Baron Karl von (1788-1869)
- Reichs, Kathleen J
- Reines, Frederick
- Reinforcement, Positive and Negative
- Reinforcement, Positive and Negative
- Reinforcement, Positive and Negative
- Reinhardt Kristensen
- Reiss, Rudolph Archibald
- Relativity Theory