Encyclopedias, Almanacs, Transcripts, and Maps
- Turtles
- Turtles and Tortoises: Testudines
- Turvey, Vincent Newton (1873-1912)
- Tusk Shells: Scaphopoda
- Tuskegee Experiment
- Tutankhamen Curse
- Tuttle, Hudson (1836-1910)
- Tweedale, Charles L(akeman) (d. 1944)
- Tweedale, Violet (1862-1936)
- Twentieth-Century Spiritual Expression
- Twigg, Ena (1914-ca. 1984)
- Twisted-Wing Parasites: Strepsiptera
- Twitchell, (John) Paul (ca. 1918-1971)
- Two Cultures
- Two Worlds (Magazine)
- Tyl, Noel (1936-)
- Typtology
- Tyrant Flycatchers
- Tyrant Flycatchers
- Tyrant Flycatchers: Tyrannidae