Merrill William Stetson <br/><br/>
Code for classifiers: Principles governing the consistent placing of books in a system of classification 

 - 2 
 - Chicago  American Library Association  1939 
 - xi,177p. 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library Science