@book{47766,
	author = {Wittgenstein, Ludwig, and Russell, Bertrand,},
	title = {Tractatus Logico-Philosophicus},
	publisher = {Project Gutenberg,},
	year = {2010},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://en.wikipedia.org/wiki/Tractatus_Logico-Philosophicus},
	url = {https://www.gutenberg.org/ebooks/5740}
}