TY  - RPRT
TI  - Detection of estrus by three methods.
AU  - J S Stevenson
AU  - J H Britt
PY  - 1977
DO  - 10.3168/jds.s0022-0302(77)84135-0
UR  - https://pubmed.ncbi.nlm.nih.gov/599207/
ID  - 599207
ER  -