Low Cost Micro-Spectrometer for Resource Mapping on Mars
Metallogeny in Russia's drive for ore deposits
A glimpse at Kootenay and its wonders
Thunder mountain region, Idaho county, Idaho
Greece General Inspection of Mines -- Bulletin of Mining Activities of Greece
Direccion de Minas. Venezuela. Ministerio de minas e hidrocarburos
Aleutian Seismic Program, Seismological Bulletin, October 1970
Précis pour les compagnies concessionnaires des mines de France
Feasibility Study of Alternative Fuels for Automotive Transportation
Aleutian Seismic Program. Seismological Bulletin, May 1970