Marsis, I.O. 2021. Down Syndrome Screening Using Nuchal Translucency Thickness and Nasal Bone Eximination of Fetus at Maternal Age >= 35 Yearss. Majalah Kedokteran UKI. 25, 1 (Mar. 2021), 1-6. DOI:https://doi.org/10.33541/mkvol34iss2pp60.