title: A note on the 1978 Turkish Fertility Survey:  a problem defining contraceptive prevalence and consequent confusion.
authors.forename: L W
authors.initials: LW
authors.lastname: Kangas
mesh_terms: D001208:Asia; D001211:Asia, Western; D001723:Birth Rate; D003267:Contraception; D003268:Contraception Behavior; D003710:Demography; D003906:Developing Countries; D005193:Family Planning Services; D005298:Fertility; D011153:Population; D011157:Population Dynamics; D015203:Reproducibility of Results; D012106:Research; D012107:Research Design; D013223:Statistics as Topic; D014421:Turkey
keywords: Asia; Contraception; Contraceptive Prevalence; Contraceptive Prevalence Index; Contraceptive Usage; Data Analysis; Demographic Factors; Developing Countries; Error Sources; Family Planning; Fertility; Fertility Measurements; Fertility Surveys; Measurement; Mediterranean Countries; Population; Population Dynamics; Reliability; Research Methodology; Turkey; Western Asia; World Fertility Surveys