A History of the Trombone - David M. Guion - Google Books

https://books.google.de/books?id=R35P9oYMf4UC

A History of the Trombone, the first title in the new series American Wind Band, is a comprehensive account of the development of the trombone from its initial form as a 14th-century Medieval trumpet to its alterations in the 15th century; from its…