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Classification chart of typical coals of the United States :showing B.t.u. per pound on the moist, mineral-matter-free basis, plotted against fixed carbon on the dry, mineral-matter-free basis

Published Year

• 1930-1939 (1)

Subject

• Coal--United States (1) *

Author

• Fieldner, Arno Carl, (1)
• Frederic, W. H. (1) *
• Selvig, W. A. (1)

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