共 15 条
[1]
CARPENTER, 1934, PUB AAS, V8, P44
[2]
SHAPLEY, 1930, STAR CLUSTERS
[4]
1934, AP J, V79, P139
[5]
1936, REALM NEBULAE, P76
[6]
1935, PUB AAS, V8, P108
[7]
1931, PUB ASP, V43, P252
[8]
1902, VEROFF HEIDELBERG, V1, P125
[9]
1936, AP J, V83, P10
[10]
1934, P NAT ACAD, V20, P12