Traumzeit Verlag Gesang Der Stille Klangschalen, Reference Book, Introduction to the World of Singing Bowls - 10th Expanded Edition, By Adalgis Wulf, Origin, history, and instructions for use and playing, Portraits of over 40 types of singing bowls, ISBN: 978-3-933-825-21-6, 21 x 21 cm Large format, 72 Pages, In German language, Includes a CD with sound samples of all singing bowls presented in the book