Geomagnetic data 1971  indices, rapid variations, special intervals 
edited by Van D. Sabben 
 - Paris  IUGG Publications  1972 
 - xii, 105p. 
 - IAGA Bulletin; no. 32 b .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and astrophysics thesaurus<br/>Geomagnetism
<br/><br/><label>Universal Decimal Class. No.: </label>083.550.38  / IAGA-32B