Sources & Verification. This website, josefganz.org, is based on documented historical sources drawn from the research of Paul Schilperoord on Josef Ganz. These sources are fully cited in his book The Extraordinary Life of Josef Ganz: The Jewish Engineer Behind Hitler's Volkswagen . The estate of Josef Ganz, with hundreds of microfilms, documents, letters and photographs, was handed over to the Archiv für Zeitgeschichte (ETH Zurich) in 2025 for preservation and future public access.
