"Simple music" . . "Arrangement" . "Simple Music No. 31" . "Simple Music No. 31" . "554924" . . "16453" . "Nee" . "13 16453 177 1956 554924 Arrangement KNOPPER, HENK KNOPPER, HENK |f [componist] Nee Simple Music No. 31 Simple music" . "Arrangement" . . "554924" . "KNOPPER, HENK" . "Nee" . . "16453" . "1956"^^ . "KNOPPER, HENK |f [componist]" . "177" . . "13" . "1956" .