共 8 条
- [1] DEKOCK RP, 1948, MNASSA, V7, P74
- [2] Gordon K.C., 1949, PASP, V61, P210
- [4] Luyten WJ, 1949, PUBL ASTRON SOC PAC, V61, P179, DOI [DOI 10.1086/126169, 10.1086/126169]
- [5] MAYALL MW, 1949, HB919, P16
- [6] OHMAN Y, 1936, STOCKHOLM ANN, V12
- [8] SHAPLEY H, 1941, 228 HARV REPR