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Gephardt calls for air marshals, immediately. (September 25, 2001). WartimeLiberty. com.November 1, 2002. http://www.wartimeliberty.com/articles/01/09/26/0440214.shtml.
Aviation Industry in Shadow of Terror
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Aviation Industry in Shadow of Terror
Turk, David. United States Marshals Service: Historical Perspective. Retrieved August 29^th, 2004, from http://www.usdoj.gov/marshals/history/index.html
History of the U.S. Marshals
Dewey, Scott Hamilton. Don't Breathe the Air: Air Pollution and U.S. Environmental Politics, 1945-1970. New York: Texas A&M University Press, 2000.
Air Pollution
Scherbatskoy, Timothy, Richard L. Poirot and Richard S. Artz: "Current Knowledge of Air Pollution and Air Resource issues in the Lake Champlain Basin", Spring, 1998, p 3
The Acidification of Canadian Lakes
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