Synopsis of Biological Data on the Eel, Anguilla anguilla (Linnaeus, 1758)
by Deelder, C. L. (editor)
$ 32.00
Synoptical Flora of North America, Volume 1, Part 2 and Volume 2, Part 1 (in 2 volumes)
by Gray, Asa
$ 52.00
Systematic Catalogue of the Fishes of Tortugas, Florida with Observations on Color, Habits, and Local Distribution
by Longley, William Harding (edited and compiled by Samuel F. Hilderbrand)
$ 45.00
Systematic News of Higher and Lower Plants 1974
by Klokov, M., Schelag-Sossonko, G., Makarevicz, M., Dudka, I., and Dubovik, O.
$ 16.00
Systematic relationships of Neotropical horned frogs, genus Hemiphractus (Anura: Hylidae)
by Trueb, Linda
$ 8.00
Systematic review of Southeast Asian Longtail Macaques, Macaca fascicularis (Raffles, 1821)
by Fooden, Jack
$ 24.00