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1975ApL....16...19H - Astrophys. Lett., 16, 19-22 (1975)
Copernicus : new positions for Cygnus X-1 and 3U 0352+30 (X Per?).
HAWKINS F.J., MASON K.O. and SANFORD P.W.
Journal keyword(s):
Simbad objects: 2
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