@book{79880,
	author = {De Morgan, Augustus,},
	title = {Elementary Illustrations of the Differential and Integral Calculus},
	publisher = {Project Gutenberg,},
	year = {2012},
	address = {Salt Lake City, UT :},
	note = {Release date is 2012-03-03},
	url = {https://www.gutenberg.org/ebooks/39041}
}