549,245 EKHOLM ULLA-BRITT Premenstrual syndrome : a study of change in cyclicity, severity and sexuality : [akademisk avhandling] / by Ulla.-Britt Ekholm ; University of Umea, Department of Obstetrics and Gynecology and Physiology. -Umea : University, 1991. - 51, [52] s. : wykr. , 25 cm (Umea University Medical Dissertations, ISSN 0346-6612 ; new ser, no 323) Zawiera również 6 prac współaut. ISBN 91-7174-625-0