Harbison, Frederick. <br/><br/>
Manpower and Education /  

 - 1st ed /  
 - New York :   McGraw-Hill Book Company. 
 - p343 :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>Dewey Class. No.: </label>X:89ZB  / K5