	Authors	Year	Title
	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.
	Miller & Unklesbay	1943	The siphuncle in Late Paleozoic amonoids. Journal of Paleontology, 17 (1): 1-25, fig.1-9, pl.1-5; Tulsa,Oklahoma.