[Sex behavior of adolescents].
Caldeira
Ermelinda do Carmo Valente
Edo C
Escola Superior de Enfermagem de S. João de Deus.
D000293:Adolescent; D000294:Adolescent Behavior; D000367:Age Factors; D003267:Contraception; D005260:Female; D006801:Humans; D008297:Male; D011174:Portugal; D012424:Rural Population; D012737:Sex Factors; D012725:Sexual Behavior; D011795:Surveys and Questionnaires; D013997:Time Factors; D014505:Urban Population