@book{47750,
	author = {Krehbiel, Henry Edward,},
	title = {A Book of Operas: Their Histories, Their Plots, and Their Music},
	publisher = {Project Gutenberg,},
	year = {2004},
	address = {Salt Lake City, UT :},
	note = {Release date is 2004-05-01},
	url = {https://www.gutenberg.org/ebooks/5724}
}