Journal Article 365 History 158 Developing Countries 101 Sex role 97 Population 96 Demographic Factors 94 Population Characteristics 81 mehr ... Behavior 78 Research Support, Non-U.S. Gov't 72 Asia 70 Age Factors 64 Economic Factors 59 Electronic books 58 Population Dynamics 56 Sex 55 Women 55 Diseases 52 Sex Behavior 51 Family Planning 48 Geschlechterrolle 46 Youth 44 Research Methodology 43 Viral Diseases 43 Education 42 Social conditions 40 Developed Countries 39 Deutschland 38 Americas 37 Socioeconomic Factors 37 Adolescents 35 weniger ...