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- [22] DUST AND EXTINCTION IN THE PLANETARY-NEBULA NGC-7027 ASTROPHYSICAL JOURNAL, 1992, 385 (02): : 567 - 576
- [24] INFRARED POLARIMETRY OF THE NGC 6334-V BIPOLAR NEBULA ASTROPHYSICAL JOURNAL, 1990, 351 (02): : 573 - 577
- [30] THE HIGHLY IONIZED REGIONS OF NGC-6302 AND NGC-6537 ASTROPHYSICAL JOURNAL, 1994, 427 (02): : 867 - 873