Images Copyright Biblioteca Apostolica Vaticana
1r-118r Porphyrius Tyrius, In Ptolemaei Harmonica (Porphyrius Tyrius, 232/233-305?)
120r-144r Pediasimus, Iohannes, Geometria (Pediasimus, Iohannes, 1282-1326)
146r-254r Bryennius, Manuel Harmonica (Bryennius, Manuel)