https://catalogue-scientifique.canada.ca/record=4090915~S6*frc
Rechercher Sonnenberg, Stephen A; Rechercher Pinel, Mark J; Rechercher Merewether, E. A; Rechercher Molenaar, C. M; Rechercher Cobban, William A; Rechercher Weimer, Robert J; Rechercher McLane, Michael; Rechercher Rice, Dudley D; Rechercher Threlkeld, Charles N
Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, 1983
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