Kalam และผู้แต่งคนอื่นๆ. 1992. Unmet need for contraception in Bangladesh : a secondary data analysis of the 1989 Bangladesh fertility survey. Faculty of Graduate Studies, Mahidol University;
Kalam และผู้แต่งคนอื่นๆ. (1992) Unmet need for contraception in Bangladesh : a secondary data analysis of the 1989 Bangladesh fertility survey . Mahidol University/Bangkok.
Kalam และผู้แต่งคนอื่นๆ. Unmet need for contraception in Bangladesh : a secondary data analysis of the 1989 Bangladesh fertility survey. . Bangkok:Mahidol University, 1992.
Kalam และผู้แต่งคนอื่นๆ. (1992) Unmet need for contraception in Bangladesh : a secondary data analysis of the 1989 Bangladesh fertility survey . Mahidol University/Bangkok.