@book{ BA10188414, author = "Martin, Bernd", title = "Weltmacht oder Niedergang? : deutsche Grossmachtpolitik im 20. Jahrhundert", publisher = "Wissenschaftliche Buchgesellschaft", year = "1989", series = "WB-Forum", number = "47", URL = "https://ci.nii.ac.jp/ncid/BA10188414" }