Types of lead and zinc ore deposits in Iran

/ By Wilford S. Wright()

Final report of the regional IGCP meeting for south Asia

/ ()

The Use of Shemshak phosphate rocks or the manufacture of phosphatic fertilizers

/ ()

Reort of investigation of heavy media concentration of Elburz devonian phosphate

/ By Geoge Alctan()

The Absolute age of the base of the olduvai even is only 750,000 years

/ [By] M. Pedrami()