Search U.S. government technical reports digitized or harvested by TRAIL.
Investigation of magnetite deposits at Star Lake, St. Lawrence County, N.Y. :(to November 1945)
Magnetometric survey of the Mahopac magnetite mine, Putnam County, N.Y.
Investigation of Red-Back magnetite mine, Sterling Lake, Orange County, N.Y.
Investigation of Suffern graphite depositsn Rockland County, N.Y.