PRIMARY COSMIC RADIATION ACTIVIDAD SOLAR BALLONS CAMPO GEOMAGNETICO COSMIC RADIATION COSMIC RAY DETECTION COSMIC X-RAY SOURCES DETECCION DE RAYOS COSMICOS GEOMAGNETIC FIELD RADIACION COSMICA PRIMARIA RADIACION X SOLAR ACTIVITY SUDAMERICA X RADIATION Cosmic ray ballon measurements at laow geomagnetic latitudes, september 1962 through 1958 DECRECIMIENTO DE FORBUSH DETECTORES DE GEIGER-MUELLER Enhancement of the X-ray intensity at baloon altitudes in the south american anomally FORBUSH DECREASE GEIGER-MUELLER COUNTERS Measurement of primary cosmic and x-radiation in the South American anomaly at an altitude of 90 km, Part l. Measurement of the primary cosmic radiation intensity Medición de la radiación cósmica primaria y de la radiación X en la anomalía sudamericana a 90Km. de altura. Parte 1: medición de la intensidad de la radiación cósmica SOUTH AMERICA