APA

Davies B., Institute of Research and Projects for Oil and Gas, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest) & Institute of Research and Projects for Oil and Gas.Deep permafrost oil production: the first two years. : .

Chicago

Davies B.E, Institute of Research and Projects for Oil and Gas, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest) and Institute of Research and Projects for Oil and Gas.Deep permafrost oil production: the first two years. : .

Harvard

Davies B., Institute of Research and Projects for Oil and Gas, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest) and Institute of Research and Projects for Oil and Gas.Deep permafrost oil production: the first two years. : .

MLA

Davies B.E, Institute of Research and Projects for Oil and Gas, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest) and Institute of Research and Projects for Oil and Gas.: . .