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1993A&AS..100..107S - Astron. Astrophys., Suppl. Ser., 100, 107-171 (1993)
Optical studies of interstellar material in low density regions of the Galaxy. I. A survey of interstellar Na I and Ca II absorption toward 57 distant stars.
SEMBACH K.R., DANKS A.C. and SAVAGE B.D.
Journal keyword(s):
Simbad objects: 61
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