Haas, Georg <br/><br/>
Pachyrhachis problematicus Haas, snakelike Reptile from the Lower Cenomanian: ventral view of the skull 

 - Paris  Muséum national d'Histoire naturelle  Juin 1980 
 - pp. 87-104 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CRETACEO<br/>REPTILIA