Bartels, Julius  <br/><br/>
Collection of geomagnetic planetary indices Kp and derived daily indices, Ap and Cp, for the years 1932 to 1961 
Julius Bartels 
 - Amsterdam  International Union of Geodesy and Geophysics   1962 
 - vii+188p. 
 - International Association of Geomagnetism and Aeronomy; No. 18 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Iaga Bulletin No.18Iaga Bulletin-dataIaga IndicesIugg
<br/><br/><label>Universal Decimal Class. No.: </label>550.38  / IAGA