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NGC 6689 (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 6689" in Polish language version.

refsWebsite
Global rank Polish rank
1u-strasbg.fr
1,342nd place
566th place
1cseligman.com
low place
2,148th place
1haroldcorwin.net
low place
low place

cseligman.com

  • Courtney Seligman: NGC 6689. Celestial Atlas. [dostęp 2015-07-20]. (ang.).

haroldcorwin.net

  • Harold G. Corwin, Jr.: NGC 6690 = NGC 6689. [w:] Notes on the NGC objects, particularly those missing, misidentified, or otherwise unusual [on-line]. 2015-06-21. [dostęp 2015-07-20]. (ang.).

u-strasbg.fr

simbad.u-strasbg.fr