Williston, Samuel Wendell <br/><br/>
Water reptiles of the past and present. 

 - Chicago :  The University,  1914. 
 - 251 p. :  il. ;  24 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Paleontología<br/>Reptilia
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>568.1