@book{119415,
	author = {Fletcher, John Gould,},
	title = {The two frontiers},
	publisher = {Project Gutenberg,},
	year = {2026},
	address = {Salt Lake City, UT :},
	note = {Release date is 2026-05-17},
	url = {https://archive.org/details/twofrontiers0000john/page/n5/mode/2up}
}