@book{91003,
	author = {Walton, Frank and Davis, J. Watson,},
	title = {The Flying Machine Boys on Duty; Or, The Clue Above the Clouds},
	publisher = {Project Gutenberg,},
	year = {2015},
	address = {Salt Lake City, UT :},
	note = {Release date is 2015-10-09},
	url = {https://www.gutenberg.org/ebooks/50165}
}