Aside from the "Uranverein" and von Ardenne's team in Berlin-Lichterfelde, there was also a small research team in the "Henschel Flugzeugwerke": the study group under the direction of Prof. Dr. Ing. Herbert Wagner (1900-1982)searched for alternative sources of energy for airplanes and became interested in nuclear energy in 1940. In August 1941, they finished a detailed internal survey of the history and potential of technical nuclear physics and its applications ("Übersicht und Darstellung der historischen Entwicklung der modernen technischen Kernphysik und deren Anwendungsmöglichkeit sowie Zusammenfassung eigener Arbeitsziele und Pläne", signed by Herbert Wagner and Hugo Watzlawek (1912-1995) in Berlin. Their application to the Aviation Ministry (RLM) to found and fund an Institute for Nuclear Technology and Nuclear Chemistry ("Reichsinstituts für Kerntechnik und Kernchemie") failed, but Watzlawek continued to explore potential applications of nuclear energy and wrote a detailed textbook on technical nuclear physics. It includes one of the most detailed presentations of contemporary German knowledge about the various processes of isotope separation, and recommends their combined usage to get to sufficient amounts of enriched uranium. Walther Gerlach refused to print this textbook, but it is preserved as a typed manuscript and it appeared after the War in 1948 virtually unchanged (with just a few additions on the US atomic bomb released in 1945). In October 1944, Hugo Watzlawek wrote an article on the potential usage of nuclear energy and its many potential applications. In his view, to follow up this route of research and development was the "new pathway" to becoming the "Master of the World". It is thus a mistake to focus only on the efforts of the "Uranverein" -- other research groups in Germany were also active in research to exploit nuclear energy, especially for military purposes.