sponsored by the United Nations Institute for Training and Research (UNITAR), Alberta (Canada) Oil Sands Technology and Research Authority (AOSTRA), and the United States Department of Energy, in cooperation with the Government of Venezuela ... [et al.] ; R. F. Meyer and C. T. Steele, editors, J. C. Olson, assistant editorMining Informational Services, McGraw-Hillc1981
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- 著者標目.... (Richard F.) Steele, C. T. Olson, Jerry Chipman United N...