Teenagers 696 Teenage girls 419 Books and reading 162 Teenage boys 136 Friendship 116 Libraries and teenagers 105 Young adults' libraries 104 more ... History 99 Teenage pregnancy 94 Social conditions 87 Sexual behavior 86 Families 76 Schools 74 Prevention 73 Runaway teenagers 73 Youth 72 Young adult literature 71 Social aspects 70 Adolescence 68 Children 67 Conduct of life 63 Psychology 62 History and criticism 55 Mental health 55 Teenage mothers 55 Activity programs 54 High schools 53 Interpersonal relations 53 Parent and teenager 49 Adolescent psychology 48 less ...