http://book.klll.cc/ebooks/subject/37136.opds 2025-11-17T20:19:56Z Books about B-17 bomber Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-17T20:19:56Z https://book.klll.cc/ebooks/66809.opds Survival at Altitude for Heavy and Very Heavy Bomber Crews 2nd. Altitude Indoctrination Unit United States. Army Air Forces. Air Force