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Investigating the haloes of planetary nebulae - IV. NGC 6720, the Ring Nebula
Bryce, M., Balick, B., Meaburn, J.Volume:
266
Language:
english
Journal:
Monthly Notices of the Royal Astronomical Society
DOI:
10.1093/mnras/266.3.721
Date:
February, 1994
File:
PDF, 3.04 MB
english, 1994