RelBib: Results for "(11853856x OR 11850553x)"
https://relbib.de/search/results?filter[]=era_facet:"20th century"&filter[]=topic_facet:"Bertram, Ernst"&filter[]=topic_facet:"Germany"&filter[]=topic_facet:"History"&filter[]=~relbib_notation_facet:"KBB"&lookfor=(11853856x OR 11850553x)&type=AllFields