Encyclopedias, Almanacs, Transcripts, and Maps
- Marsh, Maurice Clement (1922-)
- Marshall Harvey Stone
- Marshall syndrome
- Marshall Syndrome
- Marshall, Mary (1842-1884)
- Marshall-Smith syndrome
- Marshall-Smith Syndrome
- Marsupial Cats
- Marsupial Cats
- Marsupial Mice and Cats, Tasmanian Devil: Dasyuridae
- Marsupial Moles: Notoryctemorphia
- Marsupial Rats and Mice
- Marsupial Rats and Mice
- Martel, Linda (1956-1961)
- Martello, Leo Louis (1931-2000)
- Marten, Sable, and Fisher
- Marten, Sable, and Fisher
- Martha Ackmann
- Martha Cowles Chase
- Martian Language