TY  - JOUR 
T1  - Characterization and discrimination of three Rhopalosiphum species (Homoptera: Aphididae) based on isozymes
JO  - Revista Brasileira de Zoologia
A1  - Lázzari, Sonia M. N.
SN  - 0101-8175
UL  - 10.1590/S0101-81751992000100015
VL  - 9 
Y1  - 1992
PB  - Brasil 
ER  -