Changing patterns of scholarship and the future of research libraries / 
University of Pennsylvania Library 
 - Philadelphia :  The Organization,  c1951 
 - x, 133 p. ;  23 cm. 
 - Essay index reprint series .
<br/><br/> A symposium in celebration of the 200th anniversary of the establishment of the University of Pennsylvania Library 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Libraries--United States<br/>Library science--Congresses<br/>Learning and scholarship
<br/><br/><label>Dewey Class. No.: </label>378.34