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List of Articles سید عباس پورهاشمی Open Access Article Abstract Page Full-Text 1 - Analysis of Normative Hierarchy in International Environmental Law Mojtaba Sobhaninia Mohsen Abdollahi Seyed Abbas Poorhashemi Open Access Article Abstract Page Full-Text 2 - Geopolitical and Environmental Study of the Pollutions in the Persian Gulf and the Gulf of Oman sona ghasemi Seyed Abbas Poorhashemi ali zare parvin farshchi Davood Hermidas Bavand Open Access Article Abstract Page Full-Text 3 - The Integrated System of Environmental Assessments: An Instrument for the Application of Precautionary Environmental Law Saeid Ferdowsi , Masoud Monavari Seyed Abbas Poorhashemi Reza Maknoon