NGC 6639 (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 6639" in Polish language version.

refsWebsite
Global rank Polish rank
1,342nd place
566th place
2nd place
6th place
18th place
140th place
low place
2,148th place
1st place
1st place
low place
low place

cseligman.com

  • Courtney Seligman: NGC 6639. [w:] Celestial Atlas [on-line]. [dostęp 2014-05-23]. (ang.).

doi.org

harvard.edu

adsabs.harvard.edu

ngcicproject.org

u-strasbg.fr

simbad.u-strasbg.fr

vizier.u-strasbg.fr

web.archive.org