Mayaud, P. N.  <br/><br/>
Supplementary geomagnetic data 1957-1975  indices Kn, Ks and Km, 1959-1963 indices aa, 1968-1975 new list of ss's, 1968-1975 yearly diagrams of activity, 1957-1975 
P. N. Mayaud and A. Romana 
 - Geomagnetic Data, 1957 -1975 (supplementary) : indices Kn,Ks and Km,1959-1963; indices aa, 1968-1975; new list of ssc's, 1968-1975; yearly diagrams of activity,1957-1975 
 - Paris  International Union of Geodesy and Geophysics   1977 
 - v+147p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Iaga Bulletin No.39Iaga Bulletin-dataIaga IndicesIugg
<br/><br/><label>Universal Decimal Class. No.: </label>550.38  / IAGA