Lateral variatins of carbonate rock adjacent to ore deposits in the upper mississippi valley Zinc- Lead district, Wisconsin, Illinois, Iowa

Die geologie des unteren chalus Tals Zentral- Alborz/ Iran

Thermal sulphidization of Uranium Oxide for recovery by flotation

Mohammad Ali Kazemzadeh

The Design and support of underground excavations in deep- level, hard- rock mines

J ohnw. Wilson

Geoloique de la region de mianeh (azerbaijan)