546,314 LARSSON BO Recurrent headache in adolescents : a study of background factors and effects of psycholagical tratment : [thesis]/ Bo Larsson ; Department of Child and Youth Psychiatry. - Uppsala : University, 1988. - [2], 61 s. ; 24 cm (Acta Universitatis Upsaliensis. Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine ISSN 0282-7476 ; 135) ISBN 91-554-2160-1