Kholodna Balka coal mine (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Kholodna Balka coal mine" in English language version.

refsWebsite
Global rank English rank
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epa.gov

  • "Coal mine methane in Ukraine" (PDF). epa.gov. January 2001. Archived from the original (PDF) on 2011-04-08. Retrieved 2010-12-29.

web.archive.org

  • "Coal mine methane in Ukraine" (PDF). epa.gov. January 2001. Archived from the original (PDF) on 2011-04-08. Retrieved 2010-12-29.