Kanonidi, Kh Geomagnetic field and ionosphere variations Kanonidi Kh and Ruzhin Yu - Moscow IZMIRAN 1997 - 233p. figs;illus;refs;tables Subjects--Topical Terms: Geomagnetic FieldGeomagnetic Field VariationIonospheric Variations Universal Decimal Class. No.: 550.38:551.510.535 / KH