Quiet daily geomagnetic fields  
edited by Wallace H. Campbell 
 - Basel  Birkhauser Verlag  1989 
 - 315-549p.  illus. 
<br/><br/><label>ISBN: </label>0-8176-2338-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomagnetic Fields
<br/><br/><label>Universal Decimal Class. No.: </label>550.38  / CAM