Maheshwari, Sonam, Brijesh P. Singh, and P.S. Pudir. “Analysis of Retrospective Time to First Pregnancy Data in Uttar Pradesh under Various Dimensions”. Journal of Institute of Science and Technology 20, no. 1 (November 25, 2015): 51–58. Accessed April 25, 2024. https://www.nepjol.info/index.php/JIST/article/view/13910.