Requested reference
Platnick, N. I. & Shadab, M. U. (1982a). A revision of the American spiders of the genus Drassyllus (Araneae, Gnaphosidae). Bulletin of the American Museum of Natural History 173: 1-97. 
-- Show included taxa
Platnick, N. I. & Shadab, M. U. (1982a). A revision of the American spiders of the genus Drassyllus (Araneae, Gnaphosidae). Bulletin of the American Museum of Natural History 173: 1-97. -- Show included taxa