List of Articles Khorāsān Open Access Article Abstract Page Full-Text 1 - Stratified Systematic Sampling in Tappeh Borj, Nishabur, Khorāsān Mohsen Dana Omran Garazhian Hassan Fazeli Nashli Open Access Article Abstract Page Full-Text 2 - Explanation and analysis of the Economic, Political, and social situation of the eastern states of the Sasanian Empire and its relationship to the conquest of the Arabs (590-651 AD) kaykhosrow Khosravi Nejad Soheila Torabi Farsani Esmaeil Sangari