Kusin, Jane A., Adrie M. Voorhoeve, A. A. J. Jansen, Sheila Lakhani, and W. T. Mannetje. 1979. “A Longitudinal Study of Pregnant Women in Relation to Outcome of Pregnancy in Kenya”. The Indian Journal of Nutrition and Dietetics 16 (5):195-205. https://informaticsjournals.com/index.php/ijnd/article/view/12393.