@book{103107,
	author = {Gwathmey, James Tayloe,},
	title = {Tumbling for Amateurs},
	publisher = {Project Gutenberg,},
	year = {2020},
	series = {Spalding athletic library. Group 14, no. 289},
	address = {Salt Lake City, UT :},
	note = {Release date is 2020-05-30},
	url = {https://www.gutenberg.org/ebooks/62283}
}