@book{100094,
	author = {Grothe, Hermann,},
	title = {Leonardo da Vinci als Ingenieur und Philosoph :},
	publisher = {Project Gutenberg,},
	year = {2019},
	address = {Salt Lake City, UT :},
	note = {Release date is 2019-04-13},
	url = {https://www.gutenberg.org/ebooks/59268}
}