@book { DaswarenWintermonatevollerArbeitHoffenundGlck, title = "«Das waren Wintermonate voller Arbeit, Hoffen und Glück ...»", subtitle = "Die Novemberrevolution 1918 in Grundzügen", author = "Heidi {Beutin} and Wolfgang {Beutin} and Ralph {Müller-Beck}", year = "2010", publisher = "Peter Lang Verlag", address = "Berlin, Germany", url = "https://www.peterlang.com/document/1135516" }