"Toccata's, toetsinstrument, BWV 912a, D gr.t." . "BACH, JOHANN SEBASTIAN |f [componist]" . "145731 150020 419948 BACH, JOHANN SEBASTIAN |f [componist] Toccata's, toetsinstrument, BWV 912a, D gr.t." . . "419948" . "419948" . . "150020" . . . "Toccata's, toetsinstrument, BWV 912a, D gr.t." . . "145731" .