TY  - RPRT
TI  - Estrous behavior and detection in cattle.
AU  - R D Allrich
PY  - 1993
DO  - 10.1016/s0749-0720(15)30644-7
UR  - https://pubmed.ncbi.nlm.nih.gov/8348370/
ID  - 8348370
ER  -