Concepts an dmethods of biostratigraphy  

 - Stroudsburg:   Dowden, Hutchingon & Ross, Inc.,   1977 
 - xiii, 658p. 
<br/><br/><label>ISBN: </label>0-87933-246-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Universal Decimal Class. No.: </label>551.7   / L7