@book{42342,
	author = {Unknown},
	title = {A List of Factorial Math Constants},
	publisher = {Project Gutenberg,},
	year = {1995},
	address = {Salt Lake City, UT :},
	note = {The program used to calculate the factorials was a simple Scheme program, the source code of which has been lost.},
	url = {https://www.gutenberg.org/ebooks/212}
}