@book{81548,
	author = {Piper, John J.,},
	title = {Facts and Figures Concerning the Hoosac Tunnel},
	publisher = {Project Gutenberg,},
	year = {2012},
	address = {Salt Lake City, UT :},
	note = {Release date is 2012-09-08},
	url = {https://www.gutenberg.org/ebooks/40709}
}