Geomagnetic K indices Aug 1932 to Aug 1933 
edited by  J. Bartels  
 - Washington  North-Holland  1950 
 - 53p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomagnetic Indices
<br/><br/><label>Universal Decimal Class. No.: </label>083.550.38  / IAGA-12D