TY  - GEN
AU  - Singh,K V
AU  - Saad,N
AU  - el-Zein,A
TI  - Sensitivity of the plaque technique for the study of selected vaccine strains and a virulent strain of Newcastle disease virus
SN  - 0003-6919
PY  - 1971///0324
KW  - Animals
KW  - Chick Embryo
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1128/am.20.4.638-640.1970
ER  -