@book{98018,
	author = {Oeser, Hermann, and Schäfer, Rudolf,},
	title = {Ein Ehzuchtbüchlein},
	publisher = {Project Gutenberg,},
	year = {2018},
	address = {Salt Lake City, UT :},
	note = {Release date is 2018-05-20},
	url = {https://www.gutenberg.org/ebooks/57187}
}