Author: RIGBY, J.K. & A. DESROCHERS
Title: Lower and Middle Ordovician lithistid demosponges from the Mingan Islands, Gulf of St. Lawrence, Quebec, Canada.
Description: 1995. Paleont. Society Memoir 41; 35 pp. 14 fig./plts. Orig. wrps. unobtrusive libr. in corner of front cover, 4to.

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