Columbia subject headings:
Bible. Gospels--Harmonies, German--History and criticism.
Bible. Gospels--Harmonies--History and criticism.
Bible. Gospels. Syriac. Diatessaron.
Harvard subject headings:
Bible. Gospels--Harmonies, German--History and criticism.
Bible. Gospels--Harmonies--History and criticism.
Bible. Gospels. Syriac. Diatessaron.
Princeton subject headings:
Bible. Gospels--Harmonies, German--History and criticism.
Bible. Gospels--Harmonies--History and criticism.
Bible. New Testament. Gospels. Syriac. Diatessaron.