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1955ApJ...121..604J - Astrophys. J., 121, 604-610 (1955)
Symmetric galactic nebulae.
JOHNSON H.M.
Journal keyword(s):
Nomenclature: Table 1: [J55] NNN (Nos 1-152), among which 36 are cross-id. with PN YM NN (Nos 1-36)
Simbad objects: 123
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