@book{61773,
	author = {Ginkel, H. J. van},
	title = {De Groote Pyramide},
	publisher = {Project Gutenberg,},
	year = {2007},
	address = {Salt Lake City, UT :},
	note = {Release date is 2007-02-02},
	url = {https://www.gutenberg.org/ebooks/20502}
}