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- [46] Spatially resolved OII recombination line observations of the Ring Nebula, NGC 6720 ASTROPHYSICAL JOURNAL, 2001, 558 (01): : 145 - 156
- [47] OBSERVATIONS OF CARINA NEBULA (NGC3372) AT 1410 AND 2650 MC/S AUSTRALIAN JOURNAL OF PHYSICS, 1966, 19 (06): : 875 - &