Bharti, A. ., A. . Kumar, and B. P. . Singh. “TREND OF SYNTHETIC PARITY PROGRESSION RATIO (SPPR) OF INDIA: EVIDENCE FROM NATIONAL FAMILY HEALTH SURVEYS”. Journal of Reliability and Statistical Studies, vol. 12, no. 02, Dec. 2019, pp. 153-72, doi:10.13052/jrss2229-5666.12212.