Youth sexuality 1998 : repeat survey of 14-17-year-olds and their parents on behalf of ths Federal Centre for Health Education : results of the current representative survey.
Youth sexuality 1998 : repeat survey of 14-17-year-olds and their parents on behalf of ths Federal Centre for Health Education : results of the current representative survey.
- Cologne : Federal Centre for Health Education, 1998.
- 56 σ. : εικ., πίν. ; 30 εκ.
Νεολαία--Σεξουαλική συμπεριφορά.
Youth--Sexual behavior.
306.7
Νεολαία--Σεξουαλική συμπεριφορά.
Youth--Sexual behavior.
306.7