Newspaper article “Two Divers are Dead but Anti-Bend Test is Called a Success” describing that two of Hannes Keller’s divers died after being at 1000 feet; Binghamton Press article “$30,000 Air Research Grants from Link Foundation…” describing 1963 Link Foundation grants; Daily News article “Death Lurked in the Depths” with photos from Hannes Keller’s diving accident; Press article “Dive Called Success Despite 2 Deaths” describing one diver died of cardiac fatigue arrest; Evening Press article “Sea Claims 2 Frogmen” describing Keller’s gas mixture was designed to prevent the bends; and Sun Bulletin article “Survivors” with a photo of Hannes Keller and Fleuri Niggli.