Authors Year Title
Böse 1919 The Permo-Carboniferous ammonoids of the Glass Mountains, west Texas, and their stratigraphical significance. [1919, inscribed 1917].
University of Texas Bulletin, 1762: 1-241, 11 pl.,  Austin,Texas.
Clifton 1946 Middle Permian Cephalopoda from Texas and New Mexico.
Journal of Paleontology, 20 (6): 556-559, pl.85; Tulsa,Oklahoma.
González-Arreola, Villaseñor-Martínez & Corona-Esquivel 1994 Permian Fauna of the Los Arcos Formation, Municipality of Olinalá, State of Guerrero, Mexico.
Revista Mexicana de Ciencias Geológicas, 11: 214-221, 2 text-figs., 3 pls., Mexico.
Hayasaka 1947 A Permian Cephalopod Faunule from Chekiang Province, China.
Acta Geologica Taiwanica, 1 (1): 13-37, 5 figs., pls.1-2.
King, Dunbar & Cloud 1944 Geology and Paleontology of the Permian area northwest of Las Delicias, southwestern Coahuila, Mexico. [King,R.E., Dunbar,C.O., Cloud,P. & Miller,A.K.]
Geological Society of America Special Papers, 52: X + 1-172, 29 text-figs., 45 pls.
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.
Plummer & Scott 1937 Upper Paleozoic ammonites in Texas.
The geology of Texas, vol.3 pt.1, Bull. Texas. Univ., 3701: 1-516, fig.1-88, pl.1-41; Austin, Texas.