Hans (Johannes Emil) Dülfer was a German mountain climber (23 May 1892 in Barmen / Wuppertal – 15 June 1915 in Arras).
Dülfer started studying medicine from 1911 in Munich, and then changed to law and later to philosophy.
Dülfer developed several early climbing techniques, such as the Dülfersitz rappel, a basic emergency abseil skill.
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