YouTube. Thermal Processing of Solid Waste to Biochar (B. von Herzen, The Climate Foundation).
Chicago-referens (17:e uppl.)YouTube. Thermal Processing of Solid Waste to Biochar (B. Von Herzen, The Climate Foundation).
MLA-referens (9:e uppl.)YouTube. Thermal Processing of Solid Waste to Biochar (B. Von Herzen, The Climate Foundation).
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.