共 3 条
- [1] Christiansen W.N., 1955, OBSERVATORY, V75, P9
- [2] IONOSPHERIC BEHAVIOUR AT KHARTOUM DURING THE ECLIPSE OF 25TH FEBRUARY 1952 [J]. JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1955, 6 (2-3): : 91 - 112
- [3] MULLER R, 1954, OBSERVATORY, V74, P222