00509nam a2200169Ia 4500 IN-BaIIA 211028s9999 xx 000 0 eng d IIA Library Bartels, J. Geomagnetic indices K and C, 1955 J. Bartels, A.Romana and J. Veldkamp Amsterdam North-Holland 1957 124p. Geomagnetic Indices Romana, A. 207 Veldkamp, J. 208 BK 2149 2149 0 0 ddc 0 0 BAN KOD GEN 0000-00-00 0 083.550.38/ IAGA-12J 2410 2021-11-05 0000-00-00 BK