@book{104439,
	author = {Macpherson, Hector,},
	title = {A Century's Progress in Astronomy},
	publisher = {Project Gutenberg,},
	year = {2020},
	address = {Salt Lake City, UT :},
	note = {Release date is 2020-11-03},
	url = {https://www.gutenberg.org/ebooks/63615}
}