RelBib: Results for "11850553x" https://relbib.de/search/results?filter[]=~format:"Book"&filter[]=~relbib_notation_facet:"AB"&filter[]=~relbib_notation_facet:"ZC"&filter[]=~relbib_notation_facet:"[Unassigned]"&lookfor=11850553x&type=AllFields