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A contribution to the assessment of orbit accuracy, orbit determination and gravity field modelling
Klokocnik, J. unknown 1988 p.
Backmann, G. unknown 1988 p.
Response of the current sheet to a time-limited enhancement of electrical resistivity
Karlicky, M. unknown 1988 p.
Solar flare activity changes and global magnetic field diturbances
Bumba, V.;Hejna, L. unknown 1988 p.
Bumba, V.;Gesziely, L. unknown 1988 p.