( For Schubert sonatas which were left incomplete , Kempff recorded only the completed movements and not the fragments . )
He was among the first to record the complete sonatas of Franz Schubert , long before these works became popular .
( For Franz Schubert sonatas which were left incomplete , Kempff recorded only the completed movements and not the fragments . )
He was among the first to record the complete sonatas of Franz Schubert , long before these works became popular .