@book{101756,
	author = {Flammarion, Camille, and Cassirer, J.},
	title = {Komet und Erde: Eine astronomische Erzählung},
	publisher = {Project Gutenberg,},
	year = {2019},
	address = {Salt Lake City, UT :},
	note = {Release date is 2019-12-15},
	url = {https://www.gutenberg.org/ebooks/60930}
}