Zum Inhalt springen
-
Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2017
-
Moskva: IAC "Ėnergija", 2009
-
Washington, D.C: Energy Information Administration, 2009
-
Ottawa: Natural Resources Canada, 2022
-
Hannover: BGR, 20.10.2016
-
Oslo: Statistics Norway, Research Dep., 2011
-
Luxembourg: Publications Office of the European Union, 2019
-
Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2008