@book{109490,
	author = {Leinster, Murray, and Van Dongen, H. R.,},
	title = {Critical difference},
	publisher = {Project Gutenberg,},
	year = {2022},
	series = {Produced from Astounding Science Fiction, July 1956},
	address = {Salt Lake City, UT :},
	note = {Release date is 2022-08-05},
	url = {https://www.gutenberg.org/ebooks/68686}
}