United States Marine Corps. Surprise. D 214.9/6:12-1
United States Marine Corps. German Tactical Doctrine. D 214.9/6:12-11
Center of Military History. Battle of Antietam. D 114.12:AN 8/2007
Congressional Budget Office. Federal Support for Research and Development.
Y 10.2:R 31/17
Bureau of Labor Statistics. National Compensation Survey: Employee Benefits in Private Industry in the United States, 2005. L 2.3:2589
Federal Agency Task Force for Missing and Exploited Children. Federal Resources on Missing and Exploited Children. PR 42.8:C 43/R 31/2007