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Population Studies|November 19, 2011
Determinants of birth intervals and their meansD Wolfers
Population Studies|November 11, 2011
Contraceptive overlap with post-partum anovularityD Wolfers
Population Studies|November 15, 2011
The demographic effects of a contraceptive programmeD Wolfers
Population Studies|November 15, 2011
Child survival and intervals between pregnancies in Guayaquil, EcuadorD Wolfers, S Scrimshaw
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