The final piece of the puzzle fell in place after Hitler read a work by Alfred Frauenfeld which suggested resettling inhabitants of South Tyrol, believed by some to be descendants of the Goths, to the Crimea. In 1939 the South Tyrolean were ordered by Hitler and Benito Mussolini to vote on whether they wanted to remain in Italy and accept assimilation or alternatively emigrate to Germany. Over 80% chose the latter (for details see: "South Tyrol Option Agreement"). Himmler presented Master Plan East ("Generalplan Ost") to Hitler and received approval in July 1942.