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By: Boardman, Richard S. (Richard Stanton),Edition:Publication info: Washington, Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1971Volume: no.8 (1971)Series:Holding Institution: Smithsonian Libraries and ArchivesSubjects: Cyclostomata (Bryozoa), Fossil TrepostomataBHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection