Changes in Times Standing-up and Standing Time of Dairy Cows before Parturition
牛の分娩前徴-起立回数および起立時間の変化

Eiji KIMURA, Yasuhiro FUJIMOTO, Tsutomu SAWADA, Hiroshi MATSUNAGA, Junichi MORI
1991 Nihon Chikusan Gakkaiho  
doi:10.2508/chikusan.62.1074 fatcat:heifzvc3iredzgotvjfrpg4pti