541,946 SCANDINAVIAN XXII Scandinavian Congress o f Obstetrics and Gynecology : Helsinki, Finland, June 7— 10,1982 / ed.: Carl Gustaf Nilsson and Nills— Erik Backas. — Helsinki : The Scandinavian Associa­ tion of Obstetricians and Gynecologists, 1980. — 112 s. ; 24 cm Acta Obstetricia et Gynecologica Scandinayica ; suppl. 116 ISSN 0300-8835 ISBN 91-7626-039-9