Holbrook, Elmer Allen ; Ageton, Richard V. ; & Tufft, Harry Earle
Timbering of Metal Mines
Washington, Government Printing Office, 1923. orig. wrappers. 22x14cm, vi,72,(21) pp.. 21pp photoplates. Minor rubbing. Rubberstamps to cover. VG.

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Keywords: Mine Timbering, Mining, Mines, Engineering, , , , ,