You may be familiar with Dieppo’s “Complete Method for the Slide or Valve Trombone” which was an evolution and revolution in trombone pedagogy. The book you see here is the original joint effort between Berr & Dieppo, published in French. This book laid out all of the rudiments and beginner studies needed to teach someone up to an intermediate level.
After the publication of this book, Antoine Dieppo set out to augment the book to create a grand method. This revised and enlarged edition (which you see here LINK) includes an appendix of nearly 100 pages of extra material, consisting of numerous studies and duets by Dieppo, Vobaron, Carnaud, and others. This work is universally used and is known as one of the most popular trumpet methods ever written.
You can check out a full collection of samples to the left, then you can grab an immediate PDF download above.