	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.
	Frebold	1932	Marines Unterperm in Ostgrönland und die Frage der Grenzziehung zwischen dem pelagischen Oberkarbon und Unterperm. Medd. Gronld. ud. Komm. vid. und. Gronld., 84 (4): 1-35, fig.1-4, pl.1; Kobnhaven.
	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.
	Lambert, Lehrmann & Harris	2000	Correlation of the Road Canyon and Cutoff Formations, West Texas, and Its Relevance to Establishing an International Middle Permian (Guadalupian) Series In: Wardlaw,B.R., Grant,R.E. & Rohr,D.M.: The Guadalupian Symposium, Smithsonian Contributions to the Earth Sciences, 153-183, 4 pl., 11 fig., Washington.
	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.
	Miller	1945a	Some exceptional Permian ammonoids from West Texas. Journal of Paleontology, 19 (1): 14-21, fig.1-3, pl.6-8; Tulsa,Oklahoma.
	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.
	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.
	Ruzhencev	1949	Sistematika i evolyutsia semeystv Pronoritidae Frech i Medlicottiidae Karpinsky. Trudy Palentologicheskogo Instituta Akademiya Nauk SSSR, 19: 1-206, fig.1-88, pl.1-17; Moskva.
	Zheng & Chen	1979	[Upper Paleozoic Fossils.] In: Fossil Atlas of Northwest China, Qinghai. [In Chinese.] Fossil Atlas of Northwest China, Qinghai, volume 2: 10-18, pl.1-2.