Baldwin, R. T.  <br/><br/>
Tables and maps of the DGRF 1985 and IGRF 1990 
R. T. Baldwin and R. A. Langel 
 - France  International Service for Geomagnetic Indices  1993 
 - 188p. 
 - IAGA Bulletin; No. 54 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Iaga Bulletin No.54DgrfIaga Bulletin-data
<br/><br/><label>Universal Decimal Class. No.: </label>550.38  / IAGA