共 11 条
- [1] ALTENHOFF W, 1960, VEROFF STERNWARTE BO, P48
- [2] CAMPBELL WW, 1918, U CALIF PUBL LICK OB, V13, P282
- [3] Dravskikh A. F., 1964, ASTRON TSIRK, P2
- [4] DRAVSKIKH ZV, 1964, 12 INT ASTR UN GEN A
- [5] HOGLUND B, IN PREPARATION
- [6] Kardashev N. S., 1960, SOV ASTRON, V3, P813
- [7] Kardashev NS., 1959, AZH, V36, P838
- [8] THE RATIO OF HELIUM TO HYDROGEN IN THE ORION NEBULA [J]. ASTROPHYSICAL JOURNAL, 1957, 125 (02) : 328 - 335
- [9] MEZGER PG, 1960, VEROEFFENTL U STERNW, P3
- [10] SOROCHENKO RL, 1964, 12 INT ASTR UN GEN A