Hoover, P. R. (1991). Late Triassic cyrtinoid spiriferinacean brachiopods from western North America and their biostratigraphic and biogeographic implications. Bulletins of American Paleontology. 100(337): 63-109.
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Hoover, P. R.
1991
Late Triassic cyrtinoid spiriferinacean brachiopods from western North America and their biostratigraphic and biogeographic implications