Amalraj, J.C. et al. 2019. Maternal Vitamin D Levels in Gestation - An Observational Cross Sectional Study in the Rural Population of South India. International Journal of Innovative Research in Medical Science. 4, 08 (Sep. 2019), 512 to 516. DOI:https://doi.org/10.23958/ijirms/vol04-i08/738.