Search U.S. government technical reports digitized or harvested by TRAIL.
Investigation of the Toncrae-Howard copper deposits, Floyd County, Va.
Investigation of the Allah Cooper lead-zinc mine, Louisa County, Va.
Investigation of Vest nickel prospect, Floyd County, Va.
Investigation of Valzinco lead-zinc mine, Spotsylvania County, Va.
Investigation of the White zinc-lead deposit, Lafayette County, Wis.
Investigation of Scallon-Todd lease, Aitkin County, Minn.
Shallow lead diggings, Grant and Lafayette Counties, Wis.
Lightweight aggregates :expansion properties of clays, shales, and argillites of Minnesota