532,724 NON-ARTICULAR Non-articular forms of rheumatoid arthritis. Proceedings of the IV I. S. R. A. (International Study Centre for Rheumatic Diseases.) Symposiím. The Hague-October 20 and 21 1976. Ed. by T. E. W. Feltkamp. Leyden 1977 Stafleu's Scientific Publ. Co 8° s. 260, il. On the occasion of the 50th anniversary..