546,547 Proceedings of the Rheumatism Foundation Symposium, Heinola, September 16-19, 1987 / ed. H. Isomaki [et al.]. - Stockholm : The Almqvist and Wikseil Period. Co., 1988. - 96 s. : il., wykr. ; 25 cm (Scandinavian Journal of Rheumatology ISSN 0301-3847 ; suppl. 67)