“E Effectiveness Of Maternal Purple Sweet Potato Feeding On Increasing Hemoglobin Levels :Narrative Review: Efektivitas Pemberian Ubi Jalar Ungu Pada Ibu Terhadap Peningkatan Kadar Hemoglobin :Narrative Review” (2021) Proceeding Of Sari Mulia University Midwifery National Seminars, 3(1), pp. 179–194. doi:10.33859/psmumns.v3i1.809.