@book{49225,
	author = {Vries, Hugo de, and MacDougal, Daniel Trembly,},
	title = {Species and Varieties, Their Origin by Mutation},
	publisher = {Project Gutenberg,},
	year = {2005},
	address = {Salt Lake City, UT :},
	note = {Release date is 2005-01-01},
	url = {https://www.gutenberg.org/ebooks/7234}
}