303,863 TWENTY 20 vers’ experience with ketoprofen / ed. E. M. Veys. - [Stockholm] : Scandinavian University Press-Universitrtsforlaget : Almqvist and Wiksell International, 1991. - [4], 44 s. ; 24 cm (Scandinavian Journal of Eheumatology, ISSN 0301-3847 ; suppl. 90[