Program and abstracts for the general scientific assembly, Madrid, 1969 edited by Leroy R. Alldredge - Paris International Union of Geodesy and Geophysics 1969 - v+167p. - International Association of Geomagnetism and Aeronomy Bulletin; No. 26 . Subjects--Topical Terms: Iaga Bulletin No.26Iaga BulletinIugg Universal Decimal Class. No.: 550.38 / IAGA