TY  - BOOK
AU  - : Blackman, R. L. (Roger L.), 
TI  - Aphids on the world's trees : an identification and information guide
SN  - 0851988776
U1  - 595.752 BLA 1994  
PY  - 1994///
CY  - Oxon : 
PB  - Cab International in association with the Natural History Museum, 
ER  -