共 15 条
[1]
ALLER LH, 1956, GASEOUS NEBULAE, P76
[2]
BURKE PG, 1967, INT C PHYS ELECTRONI
[5]
GOLDBERG L, 1964, ANN REV ASTR AP ED, V2, P95
[6]
Hastings Jr C., 1955, APPROXIMATIONS DIGIT