World Health Organization <br/><br/>
Pyrrolizindine alkaloids health and safety guide 

 - World Health Organization, Geneva  1989 
 - 20 
<br/><br/><label>ISBN: </label>92-4-154347-7 
<br/><br/><label>Dewey Class. No.: </label>R363.1796 W.H.O./H.S.G.