World Health Organization <br/><br/>
Tetradifon health and safety guide 

 - World Health Organization, Geneva  1987 
 - 40 
<br/><br/><label>ISBN: </label>92-4-154367-1 
<br/><br/><label>Dewey Class. No.: </label>R363.1796/ W.H.O./H.S.G.