@book{61183,
	author = {Mills, Wesley,},
	title = {Voice production in singing and speaking, based on scientific principles},
	publisher = {Project Gutenberg,},
	year = {2006},
	address = {Salt Lake City, UT :},
	edition = {Fourth edition, revised and enlarged},
	note = {Release date is 2006-11-20},
	url = {https://www.gutenberg.org/ebooks/19880}
}