Gretler, Armin. <br/><br/>
The training of adult middle-level personnel / 

 - Paris :  Unesco,  1972. 
 - 164 p. ;  24 cm. 
<br/><br/>Includes Bibliography: p. 145-159. and Index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Occupational training.<br/>Supervisors.<br/>Industrial technicians.
<br/><br/><label>Dewey Class. No.: </label>658.31243  / GRT 1972