@book{62946,
	author = {Humboldt, Wilhelm von,},
	title = {Briefe an eine Freundin},
	publisher = {Project Gutenberg,},
	year = {2007},
	address = {Salt Lake City, UT :},
	note = {Release date is 2007-06-11},
	url = {https://www.gutenberg.org/ebooks/21801}
}