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文献信息
Contraceptive MethodsFamily PlanningContraceptive AgentsOral ContraceptivesDeveloped CountriesResearch MethodologyPrevention and ControlUrogenital SystemOral ContraceptivePsychological FactorsDemographic FactorsPopulation DynamicsReproductive BehaviorFertility ControlEndocrine SystemReproductive Tract InfectionsEconomic FactorsSigns and SymptomsAcquired Immunodeficiency SyndromeContraception
vol.18 (1990)
vol.17 (1989)
vol.16 (1988)