Isworo, Adi, Pramono Giri Kiswoyo, and Suharsono. “Cold Chain Evaluation of the Immunization Program in Primary Health Centers in 2022”. BKM Public Health and Community Medicine 40, no. 01 (January 31, 2024): e7841. Accessed November 23, 2024. https://journal.ugm.ac.id/v3/BKM/article/view/7841.