Opler, Morris E <br/><br/>
Social aspects of technical assistance in operation/ by Morris E. Opler. 

 - Paris : UNESCO, 1954. 
 - 79 p. 
 - Tensions and technology series .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>341.232. 5 =20 "1954" OPL.