Program and abstracts for the general scientific assembly, Madrid, 1969 
edited by Leroy R. Alldredge 
 - Paris  International Union of Geodesy and Geophysics   1969 
 - v+167p. 
 - International Association of Geomagnetism and Aeronomy Bulletin; No. 26 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Iaga Bulletin No.26Iaga BulletinIugg
<br/><br/><label>Universal Decimal Class. No.: </label>550.38  / IAGA