Susilani, Amalina Tri, Hertanto Wahyu Subagio, Noor Pramono, and Martha Irene Kartasurya. 2021. “Mean the Levels of 25(OH) D in the II Trimester of Pregnant Women at Sleman, Indonesia”. BKM Public Health and Community Medicine, April. https://dev.journal.ugm.ac.id/v3/BKM/article/view/1539.