@book{91720,
	author = {Balfour, John Hutton,},
	title = {Introduction to the Study of Palæontological Botany},
	publisher = {Project Gutenberg,},
	year = {2016},
	address = {Salt Lake City, UT :},
	note = {Release date is 2016-01-09},
	url = {https://www.gutenberg.org/ebooks/50882}
}