Blackman, R. L. (Roger L.),  <br/><br/>
Aphids on the world's trees : an identification and information guide 

 - Oxon :   Cab International in association with the Natural History Museum,   1994 
 - 	987 pages  hc  25cm 
<br/><br/><label>ISBN: </label>0851988776 
<br/><br/><label>Dewey Class. No.: </label>595.752 BLA 1994