Population and social organization Marriage and kinship in relation to human fertility Moni Nag Age differential marital instability and venereal disease : factors affecting fertility among the Northwest Barma S. P. Reyna Cultural factors inhibiting population growth among the Kafa of southwestern Ethiopia Amnon Orent Some aspects of socioeconomic change and fertility control among the emerging elite of the Pathans Karam Elahi The economic importance of children in a Javanese village Benjamin White Factors underlying endogamous group size John W. Adams and Alice Bee Kasakoff Birth planning : between neglect and coercion Steven Polgar Legislation influencing fertility in Czeckoslovakia Olga Vidl(c)Łkov(c)Ł The marginal family in Chile : social change and womans contraceptive behavior Gerardo Gonz(c)Łles Cort(c)♭s and Margarita Mar(c)Ưa Err(c)Łzuriz Kinship contraception and family planning in the Iranian city of Isfahan John Gulick and Margaret E. Gulick Mass acceptance of vasectomy : the role of social interaction and incentives in social change D. C. Dubey and A. Bardhan Families to the city : a study of changing values fertility and socioeconomic status among urban in migrants Susan C. Scrimshaw Residential patterns and population movement into the farmlands of Yorubaland Philip O. Olusanya