Solar terrestrial predictions-IV  v. 3 : Geomagnetic papers, Ionospheric papers 
edited by J. Hruska, M. A. Shea, D. F. Smart and G. Heckman 
 - Boulder  NOAA  1993 
 - xiv+627p.  figs; refs 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomagnetic IndicesGeomagnetismIonosphere
<br/><br/><label>Universal Decimal Class. No.: </label>550.38+551.510.535  / HRU