David T. Zabecki, "The German 1918 Offensives: A Case Study in The Operational Level of War" English | 2006 | ISBN: 0415558794 | PDF | pages: 433 | 3.1 mb
Janusz Piekalkiewicz - The German National Railway in World War 2 Schiffer Publishing | 2008 | ISBN: 0764330977 | English | 200 pages | PDF | 168.65 MB