Introduction to the study of working environment :  provision document for internal use. 

 - Geneva:   ILO,   1979.  
 - 230 p. :  30 cm. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Work environment
<br/><br/><label>Dewey Class. No.: </label>331.256