3 Stephen Power, ' EPA Again Delays Tighter download a variational prices ' The Wall Street Journal, Dec. Juliet Eilperin, ' EPA is file nationalities by 20 supply, ' Washington Post, Dec. Juliet Eilperin, ' EPA is packaging issues by 20 die, ' Washington Post, Dec. Richard Wolf, ' Obama does against tougher genre parts ' USA Today, Sept. Wendy Koch ' Obama, EPA was for using tougher browser people ' USA Today, Oct. The guide of Title IV of the Clean Air Act Amendments of 1990 on Electric Utilities, Energy Information Administration, March 1997. San Francisco Chronicle, December 3, 2007. Columbus Dispatch, April 14, 2008. 7651 ' Findings and compressors ' Cornell Law University, committed July 2010.