TY  - JOUR 
T1  - Salmonella Enteritidis in Layer Farms of Different Sizes Located in Northern China: On-Farm Sampling and Detection by the PCR Method
JO  - Brazilian Journal of Poultry Science
A1  - Li, X
A1  - Liu, L
A1  - Li, Q
A1  - Xu, G
A1  - Zheng, J
SN  - 1516-635X
UL  - 10.1590/1806-9061-2016-0318
VL  - 19 
Y1  - 2017
PB  - Brasil 
ER  -