@book{104061,
	author = {Duff, E. Gordon},
	title = {Early Printed Books},
	publisher = {Project Gutenberg,},
	year = {2020},
	address = {Salt Lake City, UT :},
	note = {Release date is 2020-09-19},
	url = {https://www.gutenberg.org/ebooks/63237}
}