共 15 条
[2]
FEAST MW, 1955, MEM ROY ASTRON SOC 2, V67
[3]
HILTNER WA, 1956, ASTROPHYS J SUPPL
[4]
JOHNSON HL, 1958, 90 LOW OBS B
[5]
JOHNSON HL, 1958, 91 LOW OBS B
[9]
SANDAGE AR, 1961, 618 CARN I WASH PUBL
[10]
STOY RH, 1958, MON NOTES ASTRON SOC, V17, P142