@book{54877,
	author = {O'Brien, George,},
	title = {An Essay on Mediæval Economic Teaching},
	publisher = {Project Gutenberg,},
	year = {2004},
	address = {Salt Lake City, UT :},
	note = {Release date is 2004-09-17},
	url = {https://www.gutenberg.org/ebooks/13488}
}