This book, "Ã?ber Heimat Und Ursprung Der Mehrstimmigen Tonkunst: Ein Beitrag Zur Musik- Und Allgemeinen Kulturgeschichte Des Mittelalters, Volumes 1-2 (German Edition)", by Victor Lederer, is a replication. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.