Barker R Wright Taxonomic notes - Tulsa Society of economic paleontologists and mineral mineralogists 1960 - xxiii,238p. cm. - Society of economic paleontologists and mineralogists; 9 . Standard No.: 49097 Source: Textual Subjects--Topical Terms: Palaeontology TaxonomieGeology Dewey Class. No.: H6212:11, K0