@article{oai:obihiro.repo.nii.ac.jp:00004679,
 author = {Hagiya, Koichi and 萩谷, 功一},
 issue = {9},
 journal = {デーリィマン},
 month = {Sep},
 note = {application/pdf},
 pages = {92--93},
 title = {難産避けるには選別精液の活用が有効　:　未経産牛への黒毛和種交配による難産回避効果は疑問},
 volume = {70},
 year = {2020}
}