@book{91117,
	author = {Hyvärinen, Eero},
	title = {Johan Tobias Beckin elämäkerta},
	publisher = {Project Gutenberg,},
	year = {2015},
	address = {Salt Lake City, UT :},
	note = {Release date is 2015-10-22},
	url = {https://www.gutenberg.org/ebooks/50279}
}