共 11 条
[1]
Hiltner W. A., 1956, ASTROPHYS J SUPPL S, V2, P389
[6]
Morgan W. W., 1954, PUBL ASTRON SOC PACI, V66, P85, DOI DOI 10.1086/126660
[7]
MORGAN WW, 1954, ASTRON J, V59, P188