International labour office <br/><br/>
Encyclopaedia of occupational health and safety 

 - Geneva  ILO  1972 
 - 1621p.  ill. 
<br/><br/> V.II 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Occupational health
<br/><br/><label>LC Class. No.: </label>MED RC963  / I6