NGC_81
NGC_81
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NGC_81Liên quan
Tài liệu tham khảo
WikiPedia: NGC_81 http://cseligman.com/text/atlas/ngc0a.htm#81 http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsear... http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=... //doi.org/10.1086%2F498708 https://ui.adsabs.harvard.edu/abs/2006AJ....131.11...