@book{107631,
	author = {United States. Army Air Forces. Air Force, 2nd. Altitude Indoctrination Unit},
	title = {Survival at Altitude for Heavy and Very Heavy Bomber Crews},
	publisher = {Project Gutenberg,},
	year = {2021},
	address = {Salt Lake City, UT :},
	note = {"Restricted."},
	url = {https://www.gutenberg.org/ebooks/66809}
}