00590cam a2200181 4500 539580047 TxAuBib 20211125120000.0 211124s2021||||||||||||||||||||||||eng|u 66809 Project Gutenberg PGUSA eng TxAuBib Survival at Altitude for Heavy and Very Heavy Bomber Crews [Gutenberg] / Anonymous. Project Gutenberg, 2021. Project Gutenberg ; 66809 Public domain in the USA. Electronic text. Project Gutenberg ; 66809. http://www.gutenberg.org/ebooks/66809