Halim, L., Sayogo, S. and Handaja, H. 1997. Relationship between calcium intake, serum ionized calcium and elevated blood pressure in primigravida after 24 weeks of Gestation. Medical Journal of Indonesia. 6, 4 (Oct. 1997), 216–20. DOI:https://doi.org/10.13181/mji.v6i4.830.