2 treff

petroleum industry and trade congresses developing countries
Petroleum co-operation among developing countries proceedings of the United Nations Meeting on Co-operation among Developing Countries in Petroleum, Geneva, 10 to 20 November, 1975
United Nations Meeting on Co-operation among Developing Countries in Petroleum
Bok Engelsk 1977
Report
Interregional Seminar on Petroleum Refining in Developing Countries
Bok Engelsk 1973