@book{67410,
	author = {Ditchfield, P. H.},
	title = {The Romance of Mathematics :},
	publisher = {Project Gutenberg,},
	year = {2008},
	address = {Salt Lake City, UT :},
	note = {Release date is 2008-08-29},
	url = {https://www.gutenberg.org/ebooks/26481}
}