Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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. (Autor:in)
1930
2 pages
Aufsatz (Zeitschrift)
Englisch
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Mine ventilation stoppings, with especial reference to coal mines in Illinois
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| Engineering Index Backfile | 1946
Building stoppings in mines with large openings
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