Department of the Commerce Bulletin 229: Fifty-nine Coal-mine Fires (1927)

Department of the Commerce Bulletin 287: Gases from Blasting in Tunnels and Metal-mine Drifts (1927)

Fair condition, thin, green softcover. The cover has discoloration, some scratches. Some pages have wrinkling. Text and illustrations throughout are clean, clear, and legible.

V111 89D VR35