共 27 条
- [11] KRON, 1948, ELECTRONICS AUG, P103
- [12] MULLER, 1918, GESCHICHTE LITERATUR, V1, P149
- [13] PLASKETT JS, 1922, PUBL DOM ASTROPHYS O, V2, P141
- [14] PLASKETT JS, 1919, PUBL DOM ASTROPHYS O, V1, P138
- [15] PRAGER R, 1934, GESCHICHTE LITERATUR, V1, P112
- [16] STEBBINS, 1928, PUB WASHBURN OBS, V15, P16
- [17] STEBBINS, 1948, AP J, V108, P419
- [18] STRUVE, 1949, AP J, V110, P160
- [19] VALLEY GE, 1948, RAD LABORATORY SERIE, V18, P480
- [20] 1914, AN, V198, P15