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

 - World Health Organization, Geneva  1988 
 - 35 
<br/><br/><label>ISBN: </label>92-4-154334-5 
<br/><br/><label>Dewey Class. No.: </label>R363.1796 W.H.O./H.S.G.