@book{13386, author = {Takahashi, Osamu and Instituto Geofísico del Perú}, title = {Statistics of solar flares:}, publisher = {Instituto Geofísico del Perú, IGP,}, year = {1962}, series = {Technical Note}, address = {Lima:}, note = {En la portada: Contract AF 49 (638) - 637. Air Force Office of Scientific Research} }