NGC 6557 (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 6557" in Polish language version.

refsWebsite

Global rank Polish rank

1,342^nd place

566^th place

low place

2,148^th place

cseligman.com

Courtney Seligman: NGC 6557. Celestial Atlas. [dostęp 2015-11-06]. (ang.).

u-strasbg.fr

simbad.u-strasbg.fr

NGC 6557 w bazie SIMBAD (ang.)