Authors: Halbert Powers Gillette

  • Earthwork And Its Cost V2: A Handbook Of Earth Excavation (1920) — Halbert Powers Gillette

    Earthwork And Its Cost V2: A Handbook Of Earth Excavation (1920) — Halbert Powers Gillette

  • Rock Excavation: Methods And Cost (1904) — Halbert Powers Gillette

    Rock Excavation: Methods And Cost (1904) — Halbert Powers Gillette