"Bamboo La Die Posaune" This is a trombone instruction book from Eastern Europe! This instruction book is generally imported from overseas, but I have it on hand, so I'm putting it up for sale! The spine of this instruction book is not very durable and is prone to damage, so I have reinforced it! * As shown in the second photo, this book is originally easily damaged. While books by authors like Arban, Kopprasch, Remington, and Rochut are famous, Alois Bambula's instruction book is said to be characterized by its unique approach to slurring techniques!