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Observations of the planetary nebulae NGC 7027 and NGC 7293 at the Kottamia Observatory
A. S. Assad, S. M. Hassan, G. S. KromovVolume:
14
Language:
english
Pages:
3
DOI:
10.1007/bf01005358
Date:
January, 1978
File:
PDF, 272 KB
english, 1978