@book{90838,
	author = {Dingelstedt, Franz von, and Wintour, Caroline},
	title = {John Gutenberg, First Master Printer :},
	publisher = {Project Gutenberg,},
	year = {2015},
	address = {Salt Lake City, UT :},
	note = {Release date is 2015-09-17},
	url = {https://www.gutenberg.org/ebooks/50000}
}