Collection of historical instructions

Collection of historical instructions
workshop books and instructions, car body construction 1920-40s, all in all more than 20 issues, paperback, among other things: 1 x H. Hilbert stamping technology in car body construction, richly illustrated, Berlin publishing house Carl Langbein K.-G., 1941, 1 x diploma engineer GH Neugebauer Forces in the engines of high-speed piston engines, their synchronization and mass balance, Berlin: Julius Springer, 1939, 1 x 3 operating instructions The Imbert wood gas system and its operation, colored folding table in the appendix, ed. from the Imbert Generators Society Cologne-Braunsfeld, 1940s, 1 x Riedel / Schida propellant gas - primer. Installation instructions and acceptance guidelines for motor vehicles powered by propellant gas, Berlin: Union Deutsche Verlagsgesellschaft, 1942, 1 x lot of workshop books: Dr. Walther Burstyn Soldering, Dr.-Ing. Erdmann Kothny Flawless cast, A. Peter pressing the metals etc., all Berlin: Springer-Verlag, 1930-1944, different. strong signs of age and wear (among others, damaged, soiled)