The higher effect conforms with the known positive relationship of contraceptive use with maternal schooling. Rights and permissions Reprints and Permissions. Sex ratio and birth control, American Journal of Sociology — Google Scholar Williamson, N. Google Scholar Cholera Research Laboratory, The data base update of the population laboratory at Matlab, Bangladesh: Implications for mortality analysis, pp. Unpublished figures from Demographic Surveillance System, Matlab. Pilot study of the calendar rhythm method in the Matlab area of Bangladesh.
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