SECTION III.
Reading edition
A CURIOUS ENGRAVING SHOWING AN ORGANIST PERFORMING UPON AN INSTRUMENT WITH BROAD KEYS. FROM FRANCHINUS GAFFURIUS' THEORICA MUSICA. 1492.

Reading edition
A CURIOUS ENGRAVING SHOWING AN ORGANIST PERFORMING UPON AN INSTRUMENT WITH BROAD KEYS. FROM FRANCHINUS GAFFURIUS' THEORICA MUSICA. 1492.
