Pitt, G. J., & Millward, G. R. (1979). Coal and modern coal processing: An introduction. London : Academic Pr..
Chicago-čujuhus (17. p.)Pitt, G. J., juo G. R. Millward. Coal and Modern Coal Processing: An Introduction. London : Academic Pr., 1979.
MLA-čujuhus (9. p.)Pitt, G. J., juo G. R. Millward. Coal and Modern Coal Processing: An Introduction. London : Academic Pr., 1979.
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