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Authors |
Year |
Title |
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Elias |
1938 |
Studies of Late Paleozoic ammonoids.
Journal of Paleontology, 12 (1): 86-100, pl.19,20; Tulsa,Oklahoma.
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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.
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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.
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Miller, Furnish & Clark |
1957 |
Permian ammonoids from Western United States.
Journal of Paleontology, 31 (6): 1057-1068, fig.1-6, pl.133-134; Tulsa,Oklahoma.
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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.
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Smith |
1903 |
The Carboniferous Ammonoids of America.
Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.
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Tharalson |
1984 |
Revision of the Early Permian ammonoid family Perrinitidae.
Journal of Paleontology, 58 (3): 804-833, fig.1-24, 1tab.; Lawrence, Kansas.
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Tumanskaia |
1963 |
Permskie ammonei tsentral'nogo Pamira i ikh stratigraficheskoe znachenie.
Otd. geol.-geogr. nauk Akad. Nauk SSSR: 1-119, fig.1-48, pl.A,B,1-23; Moskva.
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White |
1891 |
The Texas Permian and its Mesozoic types of fossils.
Bulletin of the United States Geological Survey, No.77: 1-51, pl.1-4; Washington.
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