Merrill, William Stetson <br/><br/>
Code for classifiers :  principles governing the consistent placing of books in a system of classification / 
William Stetson Merrill 
 - 2nd ed. 
 - Chicago :  American library association ,  1939 
 - xi, [1], 177 p., 1 l. ;  21 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification--Books
<br/><br/><label>Dewey Class. No.: </label>020  / MER