@book{80930,
	author = {Ballard, Robert,},
	title = {The Solution of the Pyramid Problem; or, Pyramid Discoveries :},
	publisher = {Project Gutenberg,},
	year = {2012},
	address = {Salt Lake City, UT :},
	note = {Release date is 2012-06-26},
	url = {https://www.gutenberg.org/ebooks/40091}
}