@book{97040,
	author = {Tilberg, Frederick,},
	title = {Gettysburg National Military Park, Pennsylvania},
	publisher = {Project Gutenberg,},
	year = {2017},
	series = {National Park Service Historical Handbook Series #9},
	address = {Salt Lake City, UT :},
	note = {Release date is 2017-12-20},
	url = {https://www.gutenberg.org/ebooks/56209}
}