อ้างอิง ของ เมซีเย_7

  1. 1 2 [ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Messier+7 "MESSIER 007"] Check |url= value (help), NASA/IPAC Extragalactic Database, NASA, สืบค้นเมื่อ 2012-04-19
  2. ↑ Villanova, S.; Carraro, G.; Saviane, I. (2009), "A spectroscopic study of the open cluster NGC 6475 (M 7). Chemical abundances from stars in the range Teff = 4500-10 000 K", Astronomy and Astrophysics, 504 (3): 845–852, arXiv:0906.4330, Bibcode:2009A&A...504..845V, doi:10.1051/0004-6361/200811507 Unknown parameter |month= ignored (help)
  3. ↑ Gendler, Robert; Christensen, Lars Lindberg; Malin, David (2011), Treasures of the Southern Sky: A Photographic Anthology, Springer, p. 139, ISBN 1461406277
  4. ↑ Jones, Kenneth Glyn (1991), Messier's Nebulae and Star Clusters, The Practical astronomy handbook series (2ns ed.), Cambridge University Press, p. 1, ISBN 0521370795

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WikiPedia: เมซีเย_7 http://books.google.com/books?id=SLEzPBn1i2gC&pg=P... http://books.google.com/books?id=fJtp27II6lYC&pg=P... //arxiv.org/abs/0906.4330 //doi.org/10.1051%2F0004-6361%2F200811507 http://www.seds.org/messier/m/m007.html http://www.wikisky.org/?object=NGC+6475 http://www.wikisky.org/?object=NGC+6475&img_source... http://www.wikisky.org/?object=NGC+6475&img_source... http://www.wikisky.org/?object=NGC+6475&img_source... http://www.wikisky.org/?object=NGC+6475&img_source...