共 8 条
[1]
LOWER, 1939, AP J, V89, P137
[2]
Minkowski R., 1949, PASP, V61, P151
[5]
STRUVE O, 1939, CONTR MCDONALD OBS, V9
[6]
STRUVE O, 1951, SKY TELESCOPES, V10, P215
[7]
PROBLEMS COSMICAL AE, P185
[8]
1940, AP J, V91, P20