Search U.S. government technical reports digitized or harvested by TRAIL.
Mining and grinding methods and costs at the Dennison Sewer Pipe Company Clay Mine, Dennison, Ohio
Mining and grinding methods and costs at the Evans Pipe Co. Clay Mine, Ulrichsville, Ohio
Mining and grinding methods and costs at the Clay City Pipe Co. Clay Mine, Uhrichsville, Ohio
Mining and grinding methods and costs at the Malvern Clay Co. mine, Malvern, Ohio