共 15 条
- [2] Curtis H.D., 1918, PLICO, V13, P57
- [4] Photographic studies of nebulae - Fifth paper [J]. ASTROPHYSICAL JOURNAL, 1937, 86 (04) : 496 - 498
- [5] GREIG WE, 1971, ASTRON ASTROPHYS, V10, P161
- [6] HARMAN RJ, 1966, MON NOT R ASTRON SOC, V132, P15
- [7] HIGGS LA, 1971, NRC12129
- [8] HROMOV GS, 1968, B ASTRON I CZECH, V19, P1
- [10] MILNE DK, TO BE PUBLISHED