@book{70572,
	author = {Apgar, A. C.},
	title = {Trees of the Northern United States :},
	publisher = {Project Gutenberg,},
	year = {2009},
	address = {Salt Lake City, UT :},
	note = {Release date is 2009-08-18},
	url = {https://www.gutenberg.org/ebooks/29724}
}