تشارلز ارين (سياسي) (Arabic Wikipedia)

Analysis of information sources in references of the Wikipedia article "تشارلز ارين (سياسي)" in Arabic language version.

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archive.org

John Felleman (21 أغسطس 2008). "National Environmental Policy Act (NEPA), United States". The Encyclopedia of Earth. مؤرشف من الأصل في 2013-05-28. Unlike almost any other U.S. environmental policy, since their creation neither NEPA (1970), nor the CEQ NEPA Regulations (1978) have been substantively amended.

United States Environmental Protection Agency, Basic Information: National Environmental Policy Act. Environmental Policy Act October 21, 2010. Retrieved October 2, 2011. نسخة محفوظة 01 يونيو 2015 على موقع واي باك مشين.

United States Environmental Protection Agency, Basic Information: National Environmental Policy Act. Environmental Policy Act October 21, 2010. Retrieved October 2, 2011. نسخة محفوظة 01 يونيو 2015 على موقع واي باك مشين.
John Felleman (21 أغسطس 2008). "National Environmental Policy Act (NEPA), United States". The Encyclopedia of Earth. مؤرشف من الأصل في 2013-05-28. Unlike almost any other U.S. environmental policy, since their creation neither NEPA (1970), nor the CEQ NEPA Regulations (1978) have been substantively amended.