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1983A&A...124..322G - Astronomy and Astrophysics, volume 124, 322-325 (1983)
Ammonia toward DR 21 : a weak maser in ortho-NH3 ?
GUILLOTEAU S., WILSON T.L., MARTIN R.N., BATRLA W. and PAULS T.A.
Journal keyword(s):
Simbad objects: 2
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