충 (천문학) (Korean Wikipedia)

Analysis of information sources in references of the Wikipedia article "충 (천문학)" in Korean language version.

refsWebsite

Global rank Korean rank

2books.google.com

3^rd place

9^th place

low place

low place

books.google.com

Simon Newcomb; Edward S. Holden (1890). 《Astronomy》. 115, 273쪽. , at Google books
Moulton, Forest Ray (1918). 《An Introduction to Astronomy》. 255, 256쪽. Google books.

wikipedia.org

en.wikipedia.org

see references at opposition surge.