RelBib: Results for "(11585794x OR 11856921x)"
https://relbib.de/search/results?filter[]=~format:"Archived Material"&filter[]=~publisher_facet:"[Unassigned]"&filter[]=~relbib_notation_facet:"KBF"&filter[]=~relbib_notation_facet:"[Unassigned]"&lookfor=(11585794x OR 11856921x)&type=AllFields