Romana, R.  <br/><br/>
Geomagnetic data 1966  rapid variations 
R. Romana and J. Veldkamp 
 - Paris  International Union of Geodesy and Geophysics   1969 
 - vii+78p. 
 - International Association of Geomagnetism and Aeronomy; No. 12u2 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Iaga Bulletin No.12u2Iaga Bulletin-dataIaga IndicesIugg
<br/><br/><label>Universal Decimal Class. No.: </label>550.38  / IAGA