@book{51612,
	author = {Van Loon, Hendrik Willem,},
	title = {Ancient Man: The Beginning of Civilizations},
	publisher = {Project Gutenberg,},
	year = {2006},
	address = {Salt Lake City, UT :},
	note = {Release date is 2006-02-01},
	url = {https://www.gutenberg.org/ebooks/9991}
}