CHIDAMBARAM, V.C. World Fertility Survey. Some aspects of WFS data quality : a preliminary assessment - London; Voorburg International Statistical Institute; IUSSP 1980 - 36 - (WFS Comparative Studies; 16) . Index Terms--Genre/Form: CALIDAD DE LOS DATOSENCUESTA MUNDIAL DE FECUNDIDAD Universal Decimal Class. No.: 312.1(079.5)