Labudde, Klaus books & textbook
Topics in Mathematics for the Eleventh Grade: Based on teaching practices in Waldorf schools
Baum, Peter Gorg, Karl-F. Hanson, Uwe Hünig, Markus Labudde, Klaus Rosbigalle, Rolf Sigler, Stephan Neumann, Robert
Waldorf Publications /2014-07-20 Paperback / 292 Pages
isbn-10: 1936367114 / isbn-13: 9781936367115