Keyword hard coal mining
Coal sludge and their mixtures as prospective energy resources
Polityka Energetyczna – Energy Policy Journal 2018;21(3):137-150
Article Costs connected with current production of coal according to regulations of the European Union and the costs of sold coal according to applied in poland statistics of coal mining
Polityka Energetyczna – Energy Policy Journal 2004;7(Zeszyt specjalny 1):409-420
Fixed and variable costs in hard coal mines
Polityka Energetyczna – Energy Policy Journal 2005;8(Zeszyt specjalny 1):331-343
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| eISSN: | 2720-569X |
| ISSN: | 1429-6675 |
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