Comprehensive Prevention Of Covid 19 Services on Dairy Farms, Namorambe Subdistrict, Deli Serdang Regency. Journal of Saintech Transfer, [S. l.], v. 4, n. 2, p. 119–126, 2022. DOI: 10.32734/jst.v4i2.7508. Disponível em: https://idjpcr.usu.ac.id/jst/article/view/7508. Acesso em: 4 aug. 2025.