@book{95659,
	author = {Gillette, Henry S.},
	title = {Leonardo da Vinci, Pathfinder of Science},
	publisher = {Project Gutenberg,},
	year = {2017},
	address = {Salt Lake City, UT :},
	note = {Illustrated by the author.},
	url = {https://www.gutenberg.org/ebooks/54827}
}