	Authors	Year	Title
	Wilson	1984	The goniatite Agathiceras (Mollusca: Cephalopoda) in the Lower Permian (Wolfcampian) of California. Journal of Paleontology, 58 (1): 277-278, fig.1; Lawrence, Kansas.
	Wilson	1984	Perrinites (Cephalopoda, Ammonoidea) in the Lower Permian of California. Journal of Paleontology, 60 (5): 1133, 1 fig., Lawrence, KS.