北アメリカ星雲 (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "北アメリカ星雲" in Japanese language version.

refsWebsite

Global rank Japanese rank

887^th place

1,620^th place

18^th place

107^th place

caltech.edu

ned.ipac.caltech.edu

“NASA/IPAC Extragalactic Database”. Results for NGC 7000. 2012年5月4日閲覧。

harvard.edu

ui.adsabs.harvard.edu

Shevchenko, V. S.; Grankin, K. N.; Nel'Nikov, S. Yu. (1988). “The structure of RSF 4 CYG B - Regions of star formation from an unusual point of view”. Astronomicheskii Zhurnal (ISSN 0004-6299) 65: Nov.-Dec. 1988, p. 1230–1243. In Russian..