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Gordon |
1965 |
Carboniferous Cephalopods of Arkansas.
Professional Papers, U.S. Geological Survey, 460: 1-322, fig.1-96, pl.1-32; Washington. [imprint 1964].
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Weyer |
1972 |
Zum Alter der Ammonoideen-Faunen des Marshall-Sandsteins (Unterkarbon; Michigan, USA).
Berichte der deutschen Gesellschaft der geologischen Wissenschaften, A, Geol. Paläont., 17 (3): 325-350, 1 fig., 1 tab.; Berlin.
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Work, Nassichuk & Richards |
2000 |
Lower Viséan ammonoids from the Lower Mount Head Formation, East-Central British Columbia.
Geological Survey of Canada Bulletin, 541: 1-71, 21 text-figs., 3 pls.
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