Holland , John L. <br/><br/>
Ths psychology of vocational choice :   theory of personality types and model environments  /  
John L. Holland. 
 - Toronto :   Blaidsdell Publishing Co. ,   1966. 
 - ix , 132 p. ;    20 cm. 
<br/><br/>  Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology.--------