@book{91325,
	author = {West Texas State University. Geological Society},
	title = {Guidebook of Palo Duro Canyon},
	publisher = {Project Gutenberg,},
	year = {2015},
	address = {Salt Lake City, UT :},
	note = {Release date is 2015-11-19},
	url = {https://www.gutenberg.org/ebooks/50487}
}