800,046 KRZYŻANOWSKI MICHAŁ, WOJTYNIAK BOGDAN Chronic airways disease in Cracow : final report from a 13-year follow-up study / Michał Krzyżanowski Bogdan Wojtyniak ; grant P-05-109-N from NHLBI [National Heart, Lung and Blood Institute] Bethesda ; principal investor M. Wysocki ; co-investigator W. Jędrychowski. - Warsaw : National Institute of Hygiene, 1990. - [4], 82 s. : wykr. ; 29 cm