@article{blake_mcdaniel_king_1979, title={COSTS OF MILK HARVEST IN DAIRY-CATTLE - IMPLICATIONS FOR DIRECT SELECTION AND COW CULLING}, volume={62}, ISSN={["0022-0302"]}, DOI={10.3168/jds.S0022-0302(79)83440-2}, number={9}, journal={JOURNAL OF DAIRY SCIENCE}, author={BLAKE, RW and MCDANIEL, BT and KING, RA}, year={1979}, pages={1424–1428} }
 @article{blake_mcdaniel_king_1978, title={LABOR AND MILKING MACHINE INPUTS TO MILK HARVEST IN DAIRY-CATTLE - IMPLICATIONS FOR DIRECT SELECTION}, volume={61}, ISSN={["0022-0302"]}, DOI={10.3168/jds.S0022-0302(78)83623-6}, number={4}, journal={JOURNAL OF DAIRY SCIENCE}, author={BLAKE, RW and MCDANIEL, BT and KING, RA}, year={1978}, pages={474–488} }