Journal Article 171 History 127 Psychological Factors 102 Behavior 101 Electronic books 101 Psychological aspects 85 Deutschland 76 mehr ... Psychologie 72 Developing Countries 67 Geschichte 61 Population 58 Demographic Factors 57 Asia 48 Economic Factors 43 Social aspects 43 Internationale Politik 42 Psychology 41 Family Planning 39 Einflussgröße 37 Außenpolitik 36 Population Dynamics 35 Attitude 34 Health 34 Population Characteristics 34 Developed Countries 32 Social psychology 32 psychology 32 Germany 30 Organization And Administration 30 Education 28 weniger ...