อ้างอิง ของ ยอดเขาเอลบรุส

  1. ↑ The World Book Encyclopedia—Page 317 by World Book, Inc
  2. ↑ Mt. Elbrus : Image of the Day. Earthobservatory.nasa.gov. Retrieved on 15 May 2014.
  3. ↑ Mount Elbrus Map Sample. Ewpnet.com. Retrieved on 15 May 2014.
  4. ↑ Mount Elbrus and Upper Baksan Valley Map and Guide (Map) (2nd ed.). 1:50,000 with mountaineering information. EWP Map Guides. Cartography by EWP. EWP. 2007. ISBN 978-0-906227-95-4.
  5. ↑ "Elbrus: Summary". Global Volcanism Program. Smithsonian Institution. สืบค้นเมื่อ 25 February 2010.

แหล่งที่มา

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