United States. Office of the Federal Register.. Federal Register, Volume 74, Number 76, April 22, 2009, Pages 18285-18448. Washington D.C.. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc132938/. Accessed May 24, 2013.
Federal Register, Volume 74, Number 76, April 22, 2009, Pages 18285-18448
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