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20th meridian east (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "20th meridian east" in English language version.

refsWebsite
Global rank English rank
2books.google.com
3rd place
3rd place

books.google.com

  • Shelley, Fred M. (23 April 2013). Nation Shapes: The Story Behind the World's Borders. ABC-CLIO. p. 333. ISBN 978-1-61069-106-2.
  • Guyot, Arnold Henri; Felton, Cornelius Conway (1852). Comparative Physical Geography; Or the Earth in Relation to Man ... Translated from the French by C. C. Felton, Etc. p. 49.