Columbia subject headings:
Geochemical prospecting.
Marine mineral resources.
Ore deposits.
Prospecting--Geophysical methods.
Harvard subject headings:
Geochemical prospecting.
Marine mineral resources.
Ore deposits.
Prospecting--Geophysical methods
Princeton subject headings:
Geochemical prospecting.
Marine mineral resources.
Ore deposits.
Prospecting--Geophysical methods.