Hoppock, Robert <br/><br/>
Occupational information / 
by Robert Hoppock 
 - 2nd ed. 
 - New York :  McGrawhill,  1957. 
 - 546p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information
<br/><br/><label>Dewey Class. No.: </label>371.425  / HOP.O