@book{72156,
	author = {Ritzema Bos, J.},
	title = {Beginselen der dierkunde},
	publisher = {Project Gutenberg,},
	year = {2010},
	address = {Salt Lake City, UT :},
	note = {Release date is 2010-02-17},
	url = {https://www.gutenberg.org/ebooks/31310}
}