1. English Air—The Story of the 1922 Mt Everest Oxygen Apparatus
Jeremy S. Windsor, MB ChB, DCH, FCARCSI, George W. Rodway, PhD, CRNP 
Wilderness & Environmental Medicine 
Volume 20, Issue 1, Pages (March 2009)
DOI: /08-WEME-LH-204.1
Copyright © 2009 Wilderness Medical Society Terms and Conditions

2. Figure 1 The 1922 Mt Everest Oxygen Apparatus
Wilderness & Environmental Medicine  , 83-88DOI: ( /08-WEME-LH-204.1)
Copyright © 2009 Wilderness Medical Society Terms and Conditions

3. Figure 2 The 1922 Mt Everest Oxygen Apparatus in use on the mountain
Wilderness & Environmental Medicine  , 83-88DOI: ( /08-WEME-LH-204.1)
Copyright © 2009 Wilderness Medical Society Terms and Conditions