Very long sequences of geomagnetic activity and its annual variation - Bhargava, B. N.; Naqvi, Ali M.; Kodaikanal Observatory (Kodaikanal, Indie) (Kodaikanal : Kodaikanal Observatory, 1954)
Keywords: astronomická pozorování; astronomie; geomagnetismus; astronomical observations; astronomy; geomagnetism; separáty; reprinty; offprints; reprints