@book{107139,
	author = {Illinois State Geological Survey},
	title = {Inside Illinois: Mineral Resources},
	publisher = {Project Gutenberg,},
	year = {2021},
	series = {Illinois State Geological Survey. Educational series, 9.},
	address = {Salt Lake City, UT :},
	note = {Release date is 2021-09-16},
	url = {https://www.gutenberg.org/ebooks/66317}
}