Columbia subject headings:
Harvard subject headings:
Paleography, Italian--History.
Princeton subject headings:
Autographs--Italy--Perugia--History.
Biblioteca Augusta. Manuscript. 3106.
Franciscans--Italy--Perugia--History--Sources.
Paleography, Italian--Italy--Perugia.
Perugia (Italy)--History--Sources.
Signatures (Writing)--History.