@book{73047,
	author = {Darwin, Charles,},
	title = {Geologische Beobachtungen über die Vulcanischen Inseln :},
	publisher = {Project Gutenberg,},
	year = {2010},
	address = {Salt Lake City, UT :},
	note = {Release date is 2010-05-01},
	url = {https://www.gutenberg.org/ebooks/32201}
}