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Hee-Won Lee, Yong-Woo Kang, Yong-Ik Byun. (2000). CTIO High Resolution Spectroscopic Observation of the Planetary Nebula M2-9 and the Symbiotic Stars RR Telescopii and He 2-106. The Bulletin of The Korean Astronomical Society, 25(2), 52-52.복사