Osuna: Juan de Leon, 1549.
Public Domain [tag/del]
||El libro primero de la declaración de instrumentos
||Dom João III of Portugal
This book could be considered as a first edition: please see also (Comienca)el Libro llamado (=called)declaracion de instrumentos musicales, of the same author, edition of 1555. This book has a similar number of pages, still named as "first book", than the later edition, divided into six ones.