Isagoge artis musicae
Bacchius Geron
Bacchius Geron. Musici Scriptores Graeci. Jan, Karl von, editor. Leipzig: Teubner, 1895.
Διὰ πασῶν δὲ καὶ διὰ τεσσάρων πόσα; — Πέντε. Τίνα ταῦτα; Πρῶτον μὲν τὸ ἀπὸ ?? ἐπὶ ?? δεύτερον τὸ ἀπὸ ?? ἐπὶ ?? τρίτον τὸ (p. 6) ἀπὸ ?? ἐπὶ ?? τέταρτον τὸ ἀπὸ ?? ἐπὶ πέμπτον τὸ ἀπὸ ?? ἐπὶ ??18.