共 24 条
[1]
ALLER LH, 1954, ASTROPHYSICS, V2, P161
[3]
BAADE W, 1955, ASTRON J, V60, P151, DOI 10.1086/107181
[4]
BAADE W, 1954, MT WILSON ANN REPORT
[7]
HUBBLE EP, 1951, P AM PHIL SOC, V95, P561