Armin Gretler <br/><br/>
Training of Adult Middle-Level Personnel 

 - Geneva  United Nations Educational, Scientific & Cultural Organisation  1972 
 - 164p 
<br/><br/>Armin Gretler & United Nations Educational, Scientific & Cultural Organisation: Training of Adult Middle-Level Personnel.  Geneva.  United Nations Educational, Scientific & Cultural Organisation, 1972.--(374GRE)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>374  / UNESCO