Publications of Debrecen 3. (1977)
EDITOR: LORANT DEZSŐ DIRECTOR,HELIOPHYSICAL OBSERVATORY OF THE HUNGARIAN ACADEMY OF SCIENCES H-4010 DEBRECEN HUNGARY Editorial acknowledgements Thanks are due to Gizella Bagdács,В.Kálmán Agnes Kovács and A.Ludmány for invaluable editorial assistance in preparation of thi volume. (Publ.Debrecen Obs., Volume 3)