"Unions mobilize, put Dems on notice - Gov. Blunt's profile - Tiahrt hawks Hawker - The frat PAC - AT&T/T-Mobile action" by Chris Frates, www.politico.com. May 20, 2011.
"Biographies of Distinguished Scientific Men". Book by François Arago, translated by William Henry Smyth, Baden Powell and Robert Grant. Chapter: 'Joseph Fourier', p. 408, 1859.
Justus von Liebig (1859). “Familiar Letters on Chemistry, in its relation to Physiology, Dietetics, Agriculture, Commerce and Political Economy: Edited by John Blyth”, p.5