@book{87429,
	author = {Boulenger, George Albert,},
	title = {The Snakes of Europe},
	publisher = {Project Gutenberg,},
	year = {2014},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://en.wikipedia.org/wiki/The_Snakes_of_Europe},
	url = {https://www.gutenberg.org/ebooks/46590}
}