A look beneath the surface

• Autores: Donna Schmidt
• Localización: Mining magazine, ISSN 0308-6631, Nº. 5, 2018, págs. 44-48
• Idioma: inglés
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• Resumen

  • Even with the market's ups and downs, coal never holds stagnant. Donna Schmidt takes a broad-view look at some developments from the globe's longwall coal operations