Tài liệu tham khảo

WikiPedia: NGC_710 //edwardbetts.com/find_link?q=NGC_710 http://nedwww.ipac.caltech.edu/ http://server1.wikisky.org/starview?object=NGC+710 http://www.wikisky.org/?object=NGC+710 http://www.wikisky.org/?object=NGC+710&img_source=... http://www.wikisky.org/?object=NGC+710&img_source=... http://www.wikisky.org/?object=NGC+710&img_source=... http://www.wikisky.org/?object=NGC+710&img_source=... http://www.wikisky.org/?object=NGC+710&img_source=... http://www.wikisky.org/?object=NGC+710&img_source=...