Eurypterids of the Devonian Holland Quarry shale of Ohio /

"April 26, 1961." ; Caption title. ; Includes bibliographical references (p. 97-98). ; Mode of access: Internet. ; Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-).