ILO <br/><br/>
Man in his working environment:  A workers' education manual / 
ILO 
 - Geneva  ILO  c1979 
 - xii, 142p.:  ill.; 
<br/><br/><label>ISBN: </label>9221020606 
<br/><br/><label>Dewey Class. No.: </label>344.046