@book{83055,
	author = {Cajori, Florian,},
	title = {On the History of Gunter's Scale and the Slide Rule During the Seventeenth Century},
	publisher = {Project Gutenberg,},
	year = {2013},
	address = {Salt Lake City, UT :},
	note = {Release date is 2013-02-26},
	url = {https://www.gutenberg.org/ebooks/42216}
}