Socio-economic policy planning and monitoring requires accurate data on births, deaths and population, in order to plan effectively for provision of health, education, employment and social security services. This publication contains detailed information on the compilation of demographic data using a range of complementary methods which can be combined to suit national conditions. Topics covered include: planning collection of fertility and mortality data; fieldwork, data processing and archiving; evaluation, estimation and dissemination; civil registration records, censuses and surveys as data sources.