Population 4 Adult 3 Demographic surveys 3 Market surveys 3 Male consumers 2 Men 2 Minorities 2 更多 ... Population Characteristics 2 Quality of Life 2 Socioeconomic Factors 2 Activity programs in education 1 Adolescent 1 African Americans 1 Aids and devices 1 Asian Americans 1 Baby boom generation 1 Best books 1 Books and reading 1 Children 1 Children's literature 1 Cities and towns 1 Community life 1 Computer network resources 1 Consumer behavior 1 Consumers 1 Economic conditions 1 Ethnology 1 Family life surveys 1 Foreign relations 1 Generation X 1 少 ...