by Manfred Von Mackensen, Narrated by Michael Witri
Audio: Sound Light and Heat, Volume 1 of 3 - Grade 6 - Audio Book
Pedagogical Research Department, Union of German Waldorf Schools, Kassel, Germany, 1992
This is the entire book in one very large file and may take up to 5 minutes to download depending on your internet speed.
In print edition published by Waldorf Publications