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NGC 687 (Czech Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 687" in Czech language version.

refsWebsite
Global rank Czech rank
1caltech.edu
887th place
1,663rd place
1seds.org
5,388th place
1,978th place
1cseligman.com
low place
low place

caltech.edu

ned.ipac.caltech.edu

  • NASA/IPAC Extragalactic Database: Results for NGC 687 [online]. [cit. 2019-11-28]. Dostupné online. (anglicky) 

cseligman.com

  • SELIGMAN, Courtney. Celestial Atlas: NGC 687 [online]. [cit. 2019-11-28]. Dostupné online. (anglicky) 

seds.org

spider.seds.org

  • FROMMERT, Hartmut. Revised NGC Data for NGC 687 [online]. SEDS.org [cit. 2019-11-28]. Dostupné online. (anglicky)