552,305 TYDEN TANJA It will not happen to me : sexual behaviour among high school and university students and evaluation of STD-prevention programmes : {doctoral thesis] / by Tanja Tyden ; (Department of Obstetrics and Gyna­ ecology, University Hospital Uppsala [...]. - Uppsa­ la : Acta Universitatis Upsaliensis, 1996. - 66 , [9] S. : il. ; 24 cm (Acta Universitatis Upsaliensis. Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine, ISSN 0282-7476 ; 595) ISBN 91-554-3713-3