Proceedings of the International Study Conference on Classification for Information Retrieval 
 Classification research 
ASLIB 
 - London :  Aslib,  1957. 
 - 151 P. ;  25 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LIBRARY CLASSIFICATION
<br/><br/><label>Dewey Class. No.: </label>025.4  / PRO 1957