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- [42] SPATIAL-DISTRIBUTION OF DUST IN PLANETARY-NEBULAE NGC 6537, IC 418, BD + 30DEGREES 3639 AND NGC 6572 ASTRONOMY & ASTROPHYSICS, 1976, 50 (03): : 389 - 393
- [43] VLA OBSERVATIONS OF A HIGHLY SYMMETRIC OH MASER IN A BIPOLAR NEBULA ASTROPHYSICAL JOURNAL, 1982, 259 (02): : 625 - 633
- [44] The carbon abundance in the Wolf-Rayet shell nebula NGC 6888 ASTROPHYSICS IN THE FAR ULTRAVIOLET: FIVE YEARS OF DISCOVERY WITH FUSE, 2006, 348 : 334 - +
- [47] THE DUST AND MOLECULAR GAS CLOUD SURROUNDING A PLANETARY-NEBULA - NGC 7027 ASTROPHYSICAL JOURNAL, 1986, 300 (02): : 749 - 755
- [48] FAR-INFRARED PROPERTIES OF DUST IN THE REFLECTION NEBULA NGC-7023 ASTROPHYSICAL JOURNAL, 1981, 246 (02): : 416 - &