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1974A&AS...16..163S - Astron. Astrophys., Suppl. Ser., 16, 163-172 (1974)
A new look at the interstellar hydrogen through a very-wide-field photographic H-alpha survey of the whole Milky Way.
SIVAN J.P.
Journal keyword(s):
Nomenclature: Table 2: Siv NN (Nos 1-11)
Simbad objects: 22
