Quarry Problems in the Lime Industry, by Oliver Bowles and W. M. Myers W. M. Myers Published: 1927 Total Pages: 97 Get eBook
Coal-dust Explosion Tests in the Experimental Mine 1919-1924, Inclusive Clyde Elmer Williams Published: 1927 Total Pages: 806 Get eBook
Changes in Technology and Labor Requirements in the Crushed-stone Industry Harry S. Kantor Published: 1939 Total Pages: 202 Get eBook