Search U.S. government technical reports digitized or harvested by TRAIL.
Geophysical methods of prospecting :a brief and elementary account of the principles involved
Geophysical investigations at Caribou, Colo.
Oil prospecting in Kentucky by resistivity methods,
Results of some magnetic measurements on dikes,with experiments upon geophysical differentiation of nickel-ore deposits in the Sudbury district, Ontario, Canada
A magnetic study of some iron deposits