M Klockars, R S Koskela, E Järvinen, P J Kolari, A Rossi
Klockars M, Koskela R S, Järvinen E, Kolari P J, Rossi A.
Silica exposure and rheumatoid arthritis: a follow up study of granite workers 1940-81.
Br Med J (Clin Res Ed) 1987; 294 :997
doi:10.1136/bmj.294.6578.997