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Frest, Glenister & Furnish |
1981 |
Pennsylvanian--Permian Cheiloceratacean Ammonoid Families Maximitidae and Pseudohaloritidae.
Journal of Paleontology, 55, Suppl. 3: 1-46, fig.1-19, pl.1-7; Tulsa, Okla.
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Nassichuk |
1975 |
Carboniferous ammonoids and stratigraphy in the Canadian Arctic Archipelago.
Bulletin of the Geological Survey of Canada, 237: 1-240, fig.1-57, tab.1-33, pl.1-18; Ottawa.
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