共 15 条
[1]
BECVAR A, 1951, ATLAS COELI
[2]
BRYAM ET, 1961, MEM SOC R SCI LEIGE, V20, P469
[3]
GOLD T, 1961, MEM SOC R SCI LIEGE, V20, P477
[4]
KROOK M, PRIVATE COMMUNICATIO
[7]
RANK DH, TO BE PUBLISHED
[8]
Sharpless S, 1959, APJS, V4, P257, DOI [10.1086/190049, DOI 10.1086/190049]