@book{82493,
	author = {Russell, Bertrand,},
	title = {Introduction to Mathematical Philosophy},
	publisher = {Project Gutenberg,},
	year = {2012},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://en.wikipedia.org/wiki/Introduction_to_Mathematical_Philosophy},
	url = {https://www.gutenberg.org/ebooks/41654}
}