.549,437 OCCUPATIONAL Occupational epidemiology : Proceedings of the Seventh International Symposium on Epidemiology in Occupational Health, Tokyo, Japan, 11-13 October 1989 /eds Haruhiko Sakurai, Isao Okazaki, Kazuyuki Omae. - AmsterdamJetc. : Excerpta Medica, 1990. - XII, 343 s. : wykr. ; 25 cm (International Congress Series ; nr 889) ISBN 0-444-81337-3