@book{83708,
	author = {Montessori, Maria, and Livingston, Arthur,},
	title = {The Montessori Elementary Material :},
	publisher = {Project Gutenberg,},
	year = {2013},
	address = {Salt Lake City, UT :},
	note = {Release date is 2013-06-04},
	url = {https://www.gutenberg.org/ebooks/42869}
}