共 7 条
[3]
KRON KG, 1952, PUB ASP, V64, P165
[4]
STEBBINS J, 1951, PUB ASP, V63, P203
[5]
1950, AP J, V112, P160
[6]
1930, PUB WASHINGTON OBS, V15, P139
[7]
1951, PUB ASP, V63, P91