RelBib: Results for "(11853856x OR 11853453x)" https://relbib.de/search/results?filter[]=~author_facet:"Aler, Jan 1910-1992"&filter[]=~author_facet:"Sieg, Ulrich 1960-"&filter[]=~format:"Book"&lookfor=(11853856x OR 11853453x)&type=AllFields