Department of Homeland Security,Office of National Capital Region Coordination (NCRC), Acronyms and Glossary of Terms, District of Columbia Office of Homeland Security, Washington D.C., 2015. http://www.ncrhomelandsecurity.org/ncr/glossary.as p, (Emr Prep/ Vulnr of Teror Attacks - Amer) {903}
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}