@book{50570,
	author = {Twain, Mark,},
	title = {Roughing It, Part 7.},
	publisher = {Project Gutenberg,},
	year = {2004},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://en.wikipedia.org/wiki/Roughing_It},
	url = {https://www.gutenberg.org/ebooks/8588}
}