PRACE DOKTORSKIE - SZWECJA 546,725 OSTLIN PIROSKA Occupational career and health : methodological considerations on the healthy worker effect : [doctora thesis] / Piroska Ostlin ; Uppsala University. -Uppsala : Academiae Upsaliensis, 1989. - 55 s. ; 24 cm (Acta Universitatis Upsaliensis Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine ISSN 0282-7476 : No 224) ISBN 91-554-2452-X