Audio-visual techniques for industry 

 - New York  United Nations USA         1978 
 - ix,84p.  cm. 
 - Its, Development And Esavsfer Of Technology Series. 6 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Industrial Eoconmy
<br/><br/><label>Dewey Class. No.: </label>X9:(T:31), L8/UN