Gordon, Mackenzie 1913-
An early Reticuloceras zone fauna from the hale formation in northwestern Arkansas / by Mackenzie Gordon. -- Washington : United States Government Printing Office, 1968 - 19 p., [2] h. de lam. -- (Geological Survey Professional Paper ; 613-A).
Arkansas
Cefalópodos fósiles
564.5(767)
An early Reticuloceras zone fauna from the hale formation in northwestern Arkansas / by Mackenzie Gordon. -- Washington : United States Government Printing Office, 1968 - 19 p., [2] h. de lam. -- (Geological Survey Professional Paper ; 613-A).
Arkansas
Cefalópodos fósiles
564.5(767)