"781.47 |c Met begeleiding |d With accompaniment" . "2421 781.47 |c Met begeleiding |d With accompaniment 783.96 |c Spreekstem |d Speaking voice 783.961892147 784.1892 |c Inleidende vormen |d Introductory forms" . "2421" . . "783.96 |c Spreekstem |d Speaking voice" . "783.961892147" . "784.1892 |c Inleidende vormen |d Introductory forms" . . . . . "2421" .