NGC 138 (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 138" in Polish language version.

refsWebsite

Global rank Polish rank

low place

2,148^th place

887^th place

766^th place

5,388^th place

2,254^th place

caltech.edu

ned.ipac.caltech.edu

NGC 138 w NASA/IPAC Extragalactic Database (ang.)

cseligman.com

Courtney Seligman: NGC 138. [w:] Celestial Atlas [on-line]. [dostęp 2014-07-16]. (ang.).

seds.org

spider.seds.org

NGC 138 w serwisie SEDS.org (Revised NGC and IC Catalog) (ang.)