Haas, Otto, 1887-2005-10-052005-10-051949http://hdl.handle.net/2246/40339 p., 15 p. of plates : ill. ; 26 cm.Includes bibliographical references (p. 38-39).29193223 bytesapplication/pdfen-USQH1 .A4 vol.93, art.1, 1949Acanthoceratidae -- Wyoming -- Big Horn County.Ammonoidea -- Wyoming -- Big Horn County.Mollusks, Fossil -- Wyoming -- Big Horn County.Paleontology -- Cretaceous -- Wyoming -- Big Horn County.Paleontology -- Wyoming -- Big Horn County.text