RelBib: Results for "(11850391x OR 11860922x)"

https://relbib.de/search/results?filter[]=era_facet:"20th century"&filter[]=genre_facet:"Correspondence"&filter[]=~author_facet:"Knott, Marie Luise 1953-"&filter[]=~dewey-hundreds:"900 - History & geography"&filter[]=~format:"Book"&lookfor=(11850391x OR 11860922x)&type=AllFields