Proceedings of the Academy of Natural Sciences of Philadelphia. 

 - Philadelphia :  Academy of Natural Sciences,  1848-. 
 - v. :  ill. 
 - Unknown 
 - Vol. 4. (1848-) 
<br/><br/> Some publications have special vols. 
<br/><br/><label>ISSN: </label>0097-3157 
 = Proceedings of the Academy of Natural Sciences of Philadelphia 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural history--Periodicals