List of Articles تخصصگرایی Open Access Article Abstract Page Full-Text 1 - An Introduction to the Concept of Specialization in Archeological Studies Hamidreza Valipour Open Access Article Abstract Page Full-Text 2 - Trade Specialization and Export Productivity in OPEC: An Emphasis on Iran’s Position Mohsen Pourebadollahan Covich Nasim Mehin Aslaninia Fakhri Sadat Mohseni Zonuzi Open Access Article Abstract Page Full-Text 3 - Quantitative Analysis of Spatial Dimensions of Regional Economic sectors Using New Mixed EFLQ-RAS Method aliasghar banouei zahra ziyaee parisa mohajeri