RelBib: Results for "((11850522x OR 11850021x) OR 11850553x)" https://relbib.de/search/results?filter[]=~author_facet:"Petzoldt, Martin 1946-2015"&filter[]=~mediatype:"Non-Electronic"&lookfor=((11850522x OR 11850021x) OR 11850553x)&type=AllFields