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- [42] Global Swiss Energy Statistics for 1979. Bulletin de l'Association suisse des electriciens, 1980, 71 (12): : 598 - 642
- [43] HELIUM RESOURCES OF THE UNITED STATES, 1979. Information Circular - United States, Bureau of Mines, 1980, (8831):
- [45] PETROLEUM DEVELOPMENTS IN FAR EAST, 1979. The American Association of Petroleum Geologists bulletin, 1980, 64 (11): : 1880 - 1960
- [46] PETROLEUM DEVELOPMENTS IN NORTH AFRICA IN 1979. The American Association of Petroleum Geologists bulletin, 1980, 64 (11): : 1739 - 1775
- [48] COOLING AND HEATING LOAD CALCULATION MANUAL, 1979. Exploration and Economics of the Petroleum Industry, 1979,
- [50] Swiss Electric Power Statistics for 1979. Bulletin de l'Association suisse des electriciens, 1980, 71 (08): : 375 - 413