@book{74685,
	author = {Aycock, Roger D., and Francis, Dick},
	title = {Problem on Balak},
	publisher = {Project Gutenberg,},
	year = {2010},
	series = {Produced from the September 1953 issue of Galaxy Science Fiction.},
	address = {Salt Lake City, UT :},
	note = {Release date is 2010-10-04},
	url = {https://www.gutenberg.org/ebooks/33839}
}