★ -
Dr Rudolf Steiner and the Science of Spiritual Realities
1993
★ -
Michael Schmidt: Organic Hero or Bioterrorist
2008
★ -
Perfect Compost: a Master Class with Peter Proctor
2012
★ 5.0
Permaculture, la voie de l'autonomie
2019
★ 6.0
Utopiaggia - Un rêve de liberté en Italie
2023
