@book{42572,
	author = {Proudhon, P.-J.},
	title = {System of Economical Contradictions; Or, The Philosophy of Misery},
	publisher = {Project Gutenberg,},
	year = {1996},
	address = {Salt Lake City, UT :},
	note = {Release date is 1996-02-01},
	url = {https://www.gutenberg.org/ebooks/444}
}