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石炭紀 (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "石炭紀" in Japanese language version.

refsWebsite
Global rank Japanese rank
1nationalgeographic.co.jp
low place
2,142nd place
1u-tokyo.ac.jp
1,856th place
142nd place

nationalgeographic.co.jp

u-tokyo.ac.jp

a.u-tokyo.ac.jp