Survival at Altitude for Heavy and Very Heavy Bomber Crews 66809 [Full title: Survival at Altitude for Heavy and Very Heavy Bomber Crews] [Full author's name: Anonymous ] [author: Anonymous ] [Link: https://www.gutenberg.org/6/6/8/0/66809] [Files: 66809-0.txt; 66809-h.htm] Thanks to Kenneth R. Black, Sue Clark and Roger Frank Regards, Roger