Study on parturition of beef cattle in small holder farm: stage, placental weight, and placentomesSri Gustari, Surya Agus Prihatno, Asmarani Kusumawati, Agung Budiyanto, Erif Maha Nugraha Setyawan, Yosua Kristian Adi and Topas Wicaksono Priyo JrBIO Web Conf., 33 (2021) 06011DOI: https://doi.org/10.1051/bioconf/20213306011