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A comparison of the spectra of the ring and ansae in NGC 7009
Czyzak, S. J., Aller, L. H.Volume:
188
Language:
english
Journal:
Monthly Notices of the Royal Astronomical Society
DOI:
10.1093/mnras/188.2.229
Date:
September, 1979
File:
PDF, 742 KB
english, 1979