Author: BUTTLER, C.J. ET AL.
Title: Upper Ordovician to lowermost Silurian solitary rugose corals from the Beaverfoot Formation, southern Rocky Mountains, British Columbia and Alberta.
Description: 1988. Geol. Surv. Can. Bull. 379; pp. 47-91, 11 fig. 8 plts. Stapled, 4to.

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