Proceedings - Academy of Natural Sciences of Philadelphia 

 - Philadelphia :  Academy of Natural Sciences 
 - v. 
 - Anual 
<br/><br/> CAICYT  ISSN 
<br/><br/><label>ISSN: </label>0097-3157 
<br/><br/><label>Standard No.: </label>RELAP00029 
<br/><br/><label>Universal Decimal Class. No.: </label>5