Subject headings for the information file / 
Compiled by Miriam Ogden Ball. 
 - 7th ed. 
 - New york :  H. W. Wilson com.,  1951. 
 - xvii, 166 p. ;  25 cm. 
<br/><br/>332  332 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Library operations.
<br/><br/><label>Dewey Class. No.: </label>025.33 / B21s