Observations in Alamut- Rud valley

/ R. Kalhor()

Preliminary technological and economic evaluaion of prospects for utilization of Iranian( Shemshak)phosphate ore for fertilizer production

/ by: Ronald D. Young()

Geology of the Zenjan area

/ by K. Hirayam, A. Haghipour and J. Hajian(Haghiphour, A.-Hajian, J.)

Etude Geologique Preliminaire des Depots Potassiferes d Iran

/ par W. Chazan

Esfordi phosphate techno- economical study on the beneficiation of Esfordi phosphate rpck

/ ()