Merrill William Stetsen <br/><br/>
Code for classifiers 

 - 2nd 
 -  1939 
 - 177p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library Sicence
<br/><br/><label>Dewey Class. No.: </label>2:51, G9