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Authors
- Ray, John, 1627-1705 author1
- Ray, artist1
- Rāzī, Abū Bakr Muḥammad ibn Zakarīyā, 865?-925?2
- Rāzī, Abū Bakr Muḥammad ibn Zakarīyā, 865?-925?, author1
- Real y Pontificia Universidad de México.1
- Reisch, Gregor, -15251
- Reisch, Gregor, -1525 author2
- Richter, Christian Friedrich, 1766-1830 author1
- Ridgway, Robert, 1850-1929, author1
- Ripanelli, Riccardo, fl.1570, artist1
- Robb, R. L. (Robert Lee)1
- Robinson, D. H. (David Hamilton) author2
- Rudolphy, John, author1
- Rueff, Jakob, ca.1500-1558, Author1
- Rueff, Jakob, ca.1500-1558, author1
- Rush, Benjamin, 1746-18131
- Rusius, Laurentius.1
- Ruysch, Frederik, 1638-1731 author1