共 8 条
[1]
[Anonymous], 1958, LOWELL OBS B
[2]
BLAAUW A, 1963, BASIC ASTRONOMICAL D
[5]
Hiltner W. A., 1956, ASTROPHYS J SUPPL S, V2, P389
[6]
JOHNSON HL, 1968, NEBULAE INTERSTELLAR
[7]
Morgan W.W., 1955, ASTROPHYS J SUPPL S, V2, P41, DOI DOI 10.1086/190016