INTERNATIONAL CONGRESS SERIES ; Nr 915 EXCPERTA MEDICA 549,447 SEXOLOGY Sexology an independent field : Proceedings of the IXth World Congress of Sexology, Caracas, Venezuela, 3-8 December .1989 /eds Fernando J. Bianco, Ruben Hernandez Serrano ; co-eds. Elizabeth Anne Cotte, Aminta Perra Colmenarez. - Amsterdam [etc.] : Excerpta Medica 1990. - XIV, 467 s. ; 25 cm (International Congress Series ; nr 915) ISBN 0-444-81221-0