@book{63698,
	author = {Howard, Francis E.},
	title = {The Child-Voice in Singing :},
	publisher = {Project Gutenberg,},
	year = {2007},
	address = {Salt Lake City, UT :},
	note = {Release date is 2007-09-12},
	url = {https://www.gutenberg.org/ebooks/22581}
}