Authors	Year	Title
Miller & Furnish	1940c	Permian ammonoids of the Guadalupe Mountain Region and adjacent areas. Special Papers of the Geological Society of America, 26: 1-242, fig.1-59, pl.1-44; Baltimore.
Nassichuk	1977	Upper Permian ammonoids from the Cache Creek Group in Western Canada. Journal of Paleontology, 51 (3): 557-590, fig.1-20, tab.1-7, pl.1-3; Tulsa, Okla.
White & Skorina	2000	A Type Catalog of Fossil Invertebrates (Mollusca: Ammonoidea) in the Yale Peabody Museum. Postilla 222, Peabody Museum of Natural History, Yale University, 1-73, New Haven, CT.