Gretler, Armin <br/><br/>
The training of adult middle-level personnel 
Armin Gretler 
 - Paris  Unesco  1972 
 - 164 p. ; 24 cm. 
<br/><br/>p. 145-159 
<br/><br/><label>LCCN: </label>72-89868 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Occupational training