@book{80139,
	author = {Thorndike, Edward L.},
	title = {The Psychology of Arithmetic},
	publisher = {Project Gutenberg,},
	year = {2012},
	address = {Salt Lake City, UT :},
	note = {Release date is 2012-03-29},
	url = {https://www.gutenberg.org/ebooks/39300}
}