TY  - BOOK
AU  - Bartels, Julius
AU  - Veldkamp, J.
ED  - International Association of Geomagnetism and Aeronomy
TI  - Geomagnetic indices K and C, 1954
T2  - International Association of Geomagnetism and Aeronomy; No. 12i
PY  - 1955///
PB  - International Union of Geodesy and Geophysics 
KW  - Iaga Bulletin-dataIaga IndicesIatme BulletinsIugg
N1  - Continuation of IATME Bulletins No.12-12h
ER  -