• http://www.clay-plaster.com/
• BASIN - Building Advisory Service and Information Network
• http://www.eartharchitecture.org/

• Earth Building Association Australia 8association)

• natur & lehm (loam company)

• Gaiapolis Foundation (foundation)

• http://terre.grenoble.archi.fr

• Dachverband Lehm e.V. (association)
• Berufsverband Deutscher Baubiologen (association)
• University of Kassel (research)

• Associazione Nazionale Città della Terra Cruda (association)

• Building with Earth in Scotland (publication)

• ig lehm (association)
• Schweizerische Interessensgemeinschaft Baubiologie/Bauökologie

• Center for Earthern Architecture (research)