On Diplocraterion Torell 1870 and the Significance of Morphological Features in Vertical, Spreiten- Bearing, U- Shaped Trace Fossils

The 2002 June 22 Changureh ( Avaj) Earthquake in Qazvin Province, Northwest Iran

A New Fossil Alga from the English Silurian

A New Method for Interpretation of Aeromagnetic Maps

Decouverte et Description d' Une Nouvelle Espece de Productus du Carbonifere de L' Iran