@book{81379,
	author = {Kobbé, Gustav,},
	title = {The Complete Opera Book :},
	publisher = {Project Gutenberg,},
	year = {2012},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://en.wikipedia.org/wiki/The_Complete_Opera_Book},
	url = {https://www.gutenberg.org/ebooks/40540}
}