NGC 47 (Swedish Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 47" in Swedish language version.

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Skrutskie, M. (2006). ”The Two Micron All Sky Survey (2MASS)”. The Astronomical Journal 131 (2): sid. 1163–1183. doi:10.1086/498708. Bibcode: 2006AJ....131.1163S. http://adsabs.harvard.edu/abs/2006AJ....131.1163S.
Crook, Aidan C.; Huchra, John P.; Martimbeau, Nathalie; Masters, Karen L.; Jarrett, Tom; Macri, Lucas M. (2007). ”Groups of Galaxies in the Two Micron All Sky Redshift Survey”. The Astrophysical Journal 655 (2): sid. 790–813. doi:10.1086/510201. Bibcode: 2007ApJ...655..790C.

Skrutskie, M. (2006). ”The Two Micron All Sky Survey (2MASS)”. The Astronomical Journal 131 (2): sid. 1163–1183. doi:10.1086/498708. Bibcode: 2006AJ....131.1163S. http://adsabs.harvard.edu/abs/2006AJ....131.1163S.
Crook, Aidan C.; Huchra, John P.; Martimbeau, Nathalie; Masters, Karen L.; Jarrett, Tom; Macri, Lucas M. (2007). ”Groups of Galaxies in the Two Micron All Sky Redshift Survey”. The Astrophysical Journal 655 (2): sid. 790–813. doi:10.1086/510201. Bibcode: 2007ApJ...655..790C.