共 11 条
- [2] EVANS DS, 1954, MNASSA, V13, P25
- [3] KOPFF A, 1938, ABH PREUSS AKAD WISS
- [4] MORGAN HR, 1952, ASTR PAPERS AM EPH N, V13
- [5] Petrie R. M., 1948, JRAS CANADA, V42, P213
- [6] Petrie R. M., 1953, PUBL DOM ASTROPHYS O, V9, P297
- [7] PETRIE RM, 1946, J R ASTR SOC CAN, V40, P325
- [8] SANFORD RF, 1950, T IAU, V7, P311
- [9] WILSON RE, 1953, CARNEGIE I PUBLICATI, V601
- [10] WRIGHT KO, 1952, PUB DOM AP OBS, V9, P167