TI - Mixed connective tissue disease: twenty cases from brazil PY - 1994 AU - Balthazar, P A AU - Mendonça, L L F AU - Caleiro, M T C AU - Cossermelli, W T2 - Pan-American Congress of Rheumatology J2 - Revista Brasileira de Reumatologia PP - São Paulo VL - 34 IS - supl. SP - s62 ER -