TY  - RPRT
TI  - Genetic and environmental differences between registered and grade Holstein cows.
AU  - R L Powell
AU  - H D Norman
PY  - 1986
DO  - 10.3168/jds.s0022-0302(86)80745-7
UR  - https://pubmed.ncbi.nlm.nih.gov/3805462/
ID  - 3805462
ER  -