A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Coal mine stoppings -- Cost and upkeep
Discussion, by L. Voltzs, of U. S. Bureau of Mines Bul., no. 99, on "Mine Ventilation Stoppings"; cost data are submitted in attempt to bring it up to date and bring out outstanding comparisons.
Coal mine stoppings -- Cost and upkeep
Discussion, by L. Voltzs, of U. S. Bureau of Mines Bul., no. 99, on "Mine Ventilation Stoppings"; cost data are submitted in attempt to bring it up to date and bring out outstanding comparisons.
Coal mine stoppings -- Cost and upkeep
Min. Congress Jl
Williams, R.Y. (author)
1930
2 pages
Article (Journal)
English
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Mine ventilation stoppings, with especial reference to coal mines in Illinois
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