共 24 条
[2]
CRAINE ER, 1978, PITTSBURGH C BL LAC, P99
[6]
HOWELL SB, 1987, IN PRESS MON NOT R A
[8]
Kuhr H., 1977, Astronomy and Astrophysics Supplement Series, V29, P139
[10]
LUYTEN WJ, 1967, SEARCH FAINT BLUE ST, V43