Transactions of Oslo meeting, August 19-28, 1948 
edited by J .W. Joyce 
 - Washington, D. C.  International Association of Terrestrial Magnetism and Electricity  1950 
 - 568p. 
 - International Association of Terrestrial Magnetism and Electricity Bulletin; No. 13 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Iugg
<br/><br/><label>Universal Decimal Class. No.: </label>550.38  / IAGA