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- Realmuto, Lindsey, author4
- Rind, David, author4
- Robertson, Robert, 1742-1829, author4
- Robertson, Ruth, author4
- Rockwell, A. D. (Alphonso David), 1840-19254
- Rohé, George H. (George Henry), 1851-18994
- Ryan, Michael, 1800-18414
- Sayed, Bisma A., author4
- Schlumberger, Hans G., 1913-1967, author4
- Schneider, Andy, author4
- Sedgwick, W. T. (William Thompson), 1855-1921, author4
- Semanskee, Ashley, author4
- Shartzer, Adele, author4
- Sherrill, Hunting, 1783-18664
- Shufeldt, Robert W. (Robert Wilson), 1850-1934, author4
- Smadel, Joseph E. (Joseph Edwin), 1907-1963, author4
- Smith, Elias, 1769-18464
- Smith, Joseph Mather, 1789-18664
- Smithsonian Institution, author.4