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NGC_199 Xem thêmThực đơn
NGC_199 Xem thêmLiên quan
NGC 199 NGC 1992 NGC 1996 NGC 1993 NGC 1994 NGC 1997 NGC 1995 NGC 1998 NGC 1990 NGC 4993Tài liệu tham khảo
WikiPedia: NGC_199 http://cseligman.com/text/atlas/ngc1a.htm#199 http://ned.ipac.caltech.edu/cgi-bin/objsearch?objn... http://spider.seds.org/ngc/revngcic.cgi?NGC199 http://server1.wikisky.org/starview?object=NGC+199 http://www.wikisky.org/?object=NGC+199 http://www.wikisky.org/?object=NGC+199&img_source=... http://www.wikisky.org/?object=NGC+199&img_source=... http://www.wikisky.org/?object=NGC+199&img_source=... http://www.wikisky.org/?object=NGC+199&img_source=... http://www.wikisky.org/?object=NGC+199&img_source=...