Merrill, William Stetson,  1866- <br/><br/>
Code for classifiers :  principles governing the consistent placing of books in a system of classification / 
William Stetson Merrill 
 - 2nd ed. 
 - Chicago, Ill. :  American Library Association,  1939 
 - xi, 1, 177 p. ;  21 cm. 
<br/><br/><label>ISBN: </label>0838900275 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification--Books