World Energy Conference. Conservation Commission, Peters, W., & Schilling, H. (1978). Coal resources: The full report to the Conservation Commission of the World Energy Conference. IPC Science and Technology Press for the WEC.
Citace podle Chicago (17th ed.)World Energy Conference. Conservation Commission, W. Peters, a H.-D Schilling. Coal Resources: The Full Report to the Conservation Commission of the World Energy Conference. Guildford: IPC Science and Technology Press for the WEC, 1978.
Citace podle MLA (8th ed.)World Energy Conference. Conservation Commission, et al. Coal Resources: The Full Report to the Conservation Commission of the World Energy Conference. IPC Science and Technology Press for the WEC, 1978.
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