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1978A&A....70..719C - Astronomy and Astrophysics, volume 70, 719-732 (1978)
Gradient of H II region electron temperatures and helium abundance in the Galaxy.
CHURCHWELL E., SMITH L.F., MATHIS J., MEZGER P.G. and HUCHTMEIER W.
Journal keyword(s):
Simbad objects: 31
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