Transactions of the fourth scientific assembly, Edinburgh, Scotland, 1981 

 - Paris  International Union of Geodesy and Geophysics  1982 
 - ii+209p. 
 - International Association of Geomagnetism and Aeronomy Bulletin No. 46 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>IuggIaga Bulletin No.46Iaga BulletinIugg
<br/><br/><label>Universal Decimal Class. No.: </label>550.38  / IAGA