A glimpse at Kootenay and its wonders
Thunder mountain region, Idaho county, Idaho
Direccion de Minas. Venezuela. Ministerio de minas e hidrocarburos
Greece General Inspection of Mines -- Bulletin of Mining Activities of Greece
Metallogeny in Russia's drive for ore deposits
Geosciences and Technology Bulletin, Vol. 5, No. 1, 1968
Geosciences and Technology Bulletin. Volume 5, Number 5