WECOBIS : web-based information system on ecological building materials / published by Federal Institute for Building, Urban Affairs and Spatial Development (BBSR) within the Federal Office for Building and Regional Planning (BBR), Bonn ; authors Hildegund Figl, Stefan Haas, Matthias Klingler, Daniel Savi, Dr. Caroline Thurner, Petra Wurmer-Weiß, Dr. Gerd Zwiener
