CHEMOX Files
Correspondence, 1950 -1974.
Correspondence with manufacturers, 1951 -1965.
Chemical oxygen generators: Background literature, 1950 -1968.
Additional Note
CHEMOX--Oxygen Breathing Apparatus modified by Wyss, 1951.
Additional Note
"Expedition Suisse a L'Himalaya", 1951.
Additional Note
Newsclippings about climbers and Everest expeditions, 1951 -1997.
Additional Note
Photographs of the apparatus, 1951.
Selected originals of preservation photocopies, .
Exchange valve from the apparatus, 1951.