The coal resources of the world : an inquiry made upon the initiative of the Executive Committee of the XII International Geological Congress, Canada, 1913 : with the assistance of geological surveys and mining geologists of different countries /
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| Altri autori: | , , |
| Natura: | Atti del Convegno Libro |
| Lingua: | English |
| Pubblicazione: |
Toronto :
Morang,
1913.
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