Matthew Fontaine Maury, United States Naval Observatory (1858). “Explanations and sailing directions to accompany the Wind and current charts: approved by Captain D. N. Ingraham, chief of the Bureau of ordnance and hydrography, and pub. by authority of Hon. Isaac Toucey, secretary of the Navy”, p.167
Barack Obama's remarks in Year-End Press Conference in James S. Brady Press Briefing Room of the White House, Washington, D.C., obamawhitehouse.archives.gov. December 19, 2014.