@book{80841,
	author = {Berthold, Victor Maximilian,},
	title = {The Die Varieties of the Nesbitt Series of United States Envelopes},
	publisher = {Project Gutenberg,},
	year = {2012},
	address = {Salt Lake City, UT :},
	note = {Release date is 2012-06-15},
	url = {https://www.gutenberg.org/ebooks/40002}
}