Seiten folgten wir

http://www.ahsap.org/ - Ulusal Ahşap Birliği

http://www.tema.org.tr/ - TEMA, Türkiye Erozyonla Mücadele, Ağaçlandırma ve Doğal Varlıkları Koruma Vakfı

http://www.wwf.org.tr/ - Doğal Hayatı Koruma Vakfı

http://www.wwf.org.uk/filelibrary/pdf/windows_0305.pdf - Neden ahşap pencere?

https://www.ift-rosenheim.de/startseite - IFT Rosenheim

http://www.usgbc.org/ - The U.S. Green Building Council

http://www.apawood.org/ - The Engineered Wood Association

http://www.woodforgood.com/ - Wood for Good

http://www.wdma.com/ - Window and Door Manufacturers Association

http://uniform.it/ - Uniform, Sistemi per Serramenti