RelBib: Results for "((11850598x OR 11850021x) OR (11850553x OR 16750553x))"

https://relbib.de/search/results?filter[]=~author_facet:"Schmidt, Johann Michael 1934-"&filter[]=~dewey-hundreds:"900 - History & geography"&filter[]=~relbib_notation_facet:"[Unassigned]"&lookfor=((11850598x OR 11850021x) OR (11850553x OR 16750553x))&type=AllFields