TY  - RPRT
TI  - Twinning in cattle.
AU  - L E Rowson
AU  - R A Lawson
AU  - R M Moor
PY  - 1971
DO  - 10.1136/vr.88.8.210
UR  - https://pubmed.ncbi.nlm.nih.gov/5548715/
ID  - 5548715
ER  -