@book{89289,
	author = {Hager, Hermann,},
	title = {Das Mikroskop und seine Anwendung :},
	publisher = {Project Gutenberg,},
	year = {2015},
	address = {Salt Lake City, UT :},
	note = {Release date is 2015-03-10},
	url = {https://www.gutenberg.org/ebooks/48450}
}