@book{100088,
	author = {Contor, Roger J.,},
	title = {The Underworld of Oregon Caves National Monument},
	publisher = {Project Gutenberg,},
	year = {2019},
	address = {Salt Lake City, UT :},
	note = {Release date is 2019-04-12},
	url = {https://www.gutenberg.org/ebooks/59262}
}