Vols. for 1955-1962 include: Mining guidebook and buying directory.

Vols. for 1955-1962 include: Mining guidebook and buying directory.

Footprints in Stone is the definitive guide to the Steven C. Minkin (Union Chapel) Paleozoic Footprint Site in northwest Alabama, the discovery of whose vast qu

Excerpt from Coal Mining Kinks: Compiled From the Regular Issues of Coal Age This difficulty may be overcome by sharpening the drill as shown in Fig. 1, where,