共 36 条
[31]
WYLIE PE, 1962, GRIFFITH OBSERVER, V26, P105
[32]
1964, 12 COMPT REND SEANC, P93
[33]
1968, SCI AMER, V218, P60
[34]
1968, 52 NATL BUR STD US T, P10
[35]
1962, SCI AMER, V207, P55
[36]
1963, SKY TELESCOPE, V25, P27