Zagros phosphate
/ by G. J. williams()
Additional observations in the Niriz area
/ by E. Ricou()
Benefication of Fire- Clay of Simirum
/ by George Aleton()
Etude hydrologique par prospection electrique de la rejion de Varamine
/ by Bongah Abiari, soil and water department()
Chahar gombad
/ G. J. Williams()