Helter,N <br/><br/>
A colour Handbook or biological control in plant protection/ 
N, Helter K, Brown and N,Cattlin 
 - London   Manson   2003 
 - 126p  Hbk  
<br/><br/><label>ISBN: </label>1874545286 
<br/><br/><label>LC Class. No.: </label>SB970.H4 2003