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1975ApJ...202..365F - Astrophys. J., 202, 365-371 (1975)
Planetary nebulae in Local Group galaxies. II. Identifications, positions, number, and production rate of nebulae in NGC 221.
FORD H.C. and JENNER D.C.
Journal keyword(s):
Nomenclature: Table 2: Ford NGC 221 NN (Nos 13-22), Table 3: Ford NGC 221 a N=7 among (Nos a-m)
Simbad objects: 30