Ključne besede: coal, exploitation reserves, exploitation field, exploitation lossesCelotno besedilo (povezava drugam)
Ključne besede: energy industry, coal reserves, heating value of coal, investment project economics, opening of a coal mineCelotno besedilo (povezava drugam)
Ključne besede: brown coal, coal reserves, geological evaluation, research drillingCelotno besedilo (povezava drugam)