RT Article T1 Aids risk and prevention among adolescents JF Social science & medicine VO 33 IS 1 SP 11 OP 24 A1 Boyer, Cherrie B. A1 Kegeles, Susan M. A2 Kegeles, Susan M. LA English YR 1991 UL https://krimdok.uni-tuebingen.de/Record/1640155333 K1 Jugendliche K1 AIDS K1 Gefährdung