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2004MmSAI..75..509F - Mem. Soc. Astron. Ital., 75, 509-512 (2004)
Observations of the darkest regions in the sky: X-ray shadowing by the Bok globule Barnard 68.
FREYBERG M.J., BREITSCHWERDT D. and ALVES J.
Journal keyword(s):
Simbad objects: 6
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