Engeza kuzintandokazi
 
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Igesi yemvelo umlando intengo July 1989

Amanani Historical of Igesi yemvelo e July 1989. izindleko 1 MMBTU (1 million amayunithi British ezishisayo = 27,93 cub. amamitha) Igesi yemvelo by izinsuku.

Igesi yemvelo ishadi intengo Europe July 1989

Igesi yemvelo umlando intengo July 1989

Inani Igesi yemvelo e July 1989

Usuku Dollars ngayinye Million Btu
30.07.1989 2.090000
   Brent Intengo kawoyela ongahluziwe bukhoma namuhla
   Umlando intengo kawoyela WTI ishadi intengo kawoyela kusukela ngo-1983
   Intengo Copper umland
   Intengo Aluminium umland