Joseph T. Hannibal; Spencer G. Lucas; Allan J. Lerner; Dan S. Chaney (2005). S. G. Lucas; K. E. Zeigler; J. A. Spielmann (संपा॰). "The Permian of Central New Mexico"(PDF). New Mexico Museum of Natural History and Science Bulletin. 31: 34–38. मूल(PDF) से 4 मार्च 2016 को पुरालेखित. अभिगमन तिथि 22 मार्च 2017. |chapter= ignored (मदद)
doi.org
Dunlop, J. A.; D. Penney; O. E. Tetlie; L. I. Anderson (2008). "How many species of fossil arachnids are there?". Journal of Arachnology. 36 (2): 267–272. आइ॰एस॰एस॰एन॰0161-8202. डीओआइ:10.1636/CH07-89.1.
web.archive.org
Joseph T. Hannibal; Spencer G. Lucas; Allan J. Lerner; Dan S. Chaney (2005). S. G. Lucas; K. E. Zeigler; J. A. Spielmann (संपा॰). "The Permian of Central New Mexico"(PDF). New Mexico Museum of Natural History and Science Bulletin. 31: 34–38. मूल(PDF) से 4 मार्च 2016 को पुरालेखित. अभिगमन तिथि 22 मार्च 2017. |chapter= ignored (मदद)
worldcat.org
Dunlop, J. A.; D. Penney; O. E. Tetlie; L. I. Anderson (2008). "How many species of fossil arachnids are there?". Journal of Arachnology. 36 (2): 267–272. आइ॰एस॰एस॰एन॰0161-8202. डीओआइ:10.1636/CH07-89.1.
