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By: Olson, Storrs L.Edition:Publication info: Washington, Smithsonian Institution Press, 1977Volume: no.35 (1977)Series:Holding Institution: Smithsonian Libraries and ArchivesSubjects: Eocene Limnofregata azygosternon Paleontology WyomingBHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection