RelBib: Results for "(11850522x OR 11850553x)"
https://relbib.de/search/results?filter[]=~author_facet:"Bachhaus Eisenach gGmbH"&filter[]=~author_facet:"Internationale Bachakademie Stuttgart"&filter[]=~author_facet:"Petzoldt, Martin 1946-2015"&filter[]=~language:"German"&filter[]=~mediatype:"Non-Electronic"&lookfor=(11850522x OR 11850553x)&type=AllFields