Columbia subject headings:
Hartmann, von Aue, active 12th century. Gregorius--Manuscripts--Facsimiles.
Harvard subject headings:
Hartmann, von Aue, active 12th century. Gregorius--Manuscripts--Facsimiles.
Princeton subject headings:
Facsimiles.
Hartmann, von Aue, 12th cent. Gregorius--Manuscripts--Facsimiles.