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()