NGC 6997 (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 6997" in Polish language version.

refsWebsite

Global rank Polish rank

1,342^nd place

566^th place

5^th place

2^nd place

low place

2,148^th place

2^nd place

6^th place

low place

cseligman.com (Global: low place; Polish: 2,148^th place)

Courtney Seligman: NGC 6997. [w:] Celestial Atlas [on-line]. [dostęp 2014-12-11]. (ang.).

L. M. Rebull et al.. The North American and Pelican Nebulae. II. MIPS Observations and Analysis. „The Astrophysical Journal”. 193 (2), s. 25, 2011-03-14. DOI: 10.1088/0067-0049/193/2/25. (ang.).

Harold G. Corwin Jr.: NGC 6997. [w:] Notes on the NGC objects, particularly those missing, misidentified, or otherwise unusual [on-line]. 2019-07-12. [dostęp 2019-07-28]. (ang.).