TY  - JOUR 
T1  - Elisa evaluation of the levels of antibodies against Infectious Bronchitis Virus in laying hens using egg yolk as substrate
JO  - Brazilian Journal of Poultry Science
A1  - Rauber, RH
A1  - Flôres, ML
A1  - Pereira, CE
A1  - Grigulo, M
SN  - 1516-635X
UL  - 10.1590/S1516-635X2004000200008
VL  - 6 
Y1  - 2004
PB  - Brasil 
ER  -