Year book 

 - Philadelphia :  The American Philosophical Society,  1938- 
 - v. ;  23 cm. 
 - 1937- 
<br/><br/> Libray has : 1949 ; 1957 , 1959-1953 ; 1975 ; 1976  In progress 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Philosophy, Modern--Periodicals<br/>Philosophy, Western--Periodicals
<br/><br/><label>Dewey Class. No.: </label>191.06