@book{30840,
	author = {Wittgenstein, Ludwig. and Ogden, C. K.},
	title = {Tractatus logico-philosophicus /},
	publisher = {Routledge,},
	year = {1922 [Reprint 1962].},
	address = {London :},
	note = {English and German.},
	url = {http://www.loc.gov/catdir/enhancements/fy0909/94132776-d.html}
}