共 9 条
- [1] BLAAUW A, 1946, 52 KAPT ASTR LAB PUB
- [2] CAMPBELL WW, 1928, LICK OBS PUBL, V16, P270
- [3] CURTIS HD, 1909, LICK OBS B, V5, P140
- [4] FEAST MW, 1955, MEM RAS, V67, P67
- [5] GOLLNOW H, 1956, AJ, V61
- [7] Petrie R. M., 1953, PUBL DOM ASTROPHYS O, V9, P297
- [8] VANDENBOS WH, 1926, UNION OBS CIRC, V71, P391
- [9] VANDENBOS WH, 1926, UNION CIRC, V68, P354