Browse TRAIL Inventories

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

Limestone.

Patents on geophysical prospecting issued in the United States, England, Canada, Australia, Germany, France, and Russia

The design of small wooden head frames


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