Neu-Einrichtung der Choralvorspiele Opus 122 Nr. 2 und 5-7 / von Paul G. Bunjes. Alternative versions of the chorale preludes Opus 122, Nos. 2 and 5-7, by Paul G. Bunjes.
"To each one of these preludes another staff has been added for the separate notation of the chorale melody which enables it to assume a more prominent role in the texture."