21. National-Konzertinos Creator: Portnoff, Leo Format: print Type: supplement, model:supplement, and TEXT Language: German Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
22. National-Konzertinos Creator: Portnoff, Leo Format: print Type: supplement, model:supplement, and TEXT Language: German Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
23. Triller-concertino No. 9 Creator: Portnoff, Leo Format: print Type: supplement, model:supplement, and TEXT Language: French and German Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public