Bhardwaj, S., G. Sharma, and A. . Kumar. “ESTIMATION OF PARITY SPECIFIC FERTILITY RATES UNDER DIFFERENT FECUNDITY LEVELS”. Journal of Reliability and Statistical Studies, vol. 2, no. 1, June 2009, pp. 85-90, https://journals.riverpublishers.com/index.php/JRSS/article/view/22095.