EXPERIENCE AND INITIAL CONCLUSIONS OBTAINED IN THE 1ST PILOT CAMPAIGN ON THE EPIDEMIOLOGY OF RHEUMATIC FEVER IN MADRID. IV. TECHNIC FOR THE BACTERIOLOGICAL INVESTIGATION
EXPERIENCIA Y CONCLUSIONES INICIALES OBTENIDAS EN UNA PRIMERA CAMPA NA PILOTO SOBRE EPIDEMIOLOG'IA DE LA FIEBRE REUM'ATICA EN MADRID. IV. T'ECNICA DE LA INVESTIGACI'ON BACTERIOL'OGICA