Silva, Soma, Victor de Silva, and A.T.P.L Abeykoon. 1990. Population studies in Sri Lanka and Indonesia based on the 1987 Sri Lanka Demographic and Health Survey and the 1987 national Indonesia Contraceptive Prevalence Survey. DHS Further Analysis Reports No. 2. Columbia, Maryland, USA: Institute for Resource Development/Macro Systems Inc. Available at http://dhsprogram.com/pubs/pdf/FA2/FA2.pdf.