Gretler, Armin. <br/><br/>
The training of adult middle-level personnel / 
Armin Gretler. 
 - Paris :  Unesco,   1972. 
 - 164 p. ;  25 cm. 
<br/><br/> Includes index 
<br/><br/>Bibliography : p. 145-159. 
<br/><br/>392  392 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Occupational training.
<br/><br/><label>Dewey Class. No.: </label>374 / U2t