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NGC 6556 (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 6556" in Polish language version.

refsWebsite
Global rank Polish rank
1cseligman.com
low place
2,148th place
1haroldcorwin.net
low place
low place

cseligman.com

  • Courtney Seligman: NGC 6556. Celestial Atlas. [dostęp 2014-09-17]. (ang.).

haroldcorwin.net

  • Harold G. Corwin Jr.: NGC 6556. [w:] Notes on the NGC objects, particularly those missing, misidentified, or otherwise unusual [on-line]. 2018-01-24. [dostęp 2018-03-14]. (ang.).