Geomagnetic data 1976 indices, rapid variations, special intervals edited by D. Van Sabben - Paris International Union of Geodesy and Geophysics 1977 - xii+91p. - International Association of Geomagnetism and Aeronomy Bulletin; No. 32g . Subjects--Topical Terms: Iaga Bulletin No.32gIaga Bulletin-dataIaga IndicesIugg Universal Decimal Class. No.: 550.38 / IAGA