@book{106263,
	author = {Sutton, George Miksch,},
	title = {An Introduction to the Birds of Pennsylvania},
	publisher = {Project Gutenberg,},
	year = {2021},
	address = {Salt Lake City, UT :},
	note = {Illustrated by the author.},
	url = {https://www.gutenberg.org/ebooks/65440}
}