Originalno: Das grosse Umweltliederbuch. Mein Freund, der Baum. Voice sheet music. Das grosse Umweltliederbuch edited by Wolfgang Ahrens.
Prevod: Velik okoljski Songbook. Reinhard Mey, Peter Maffay, estrov in Abi Ofarim, Alexandra, Pete Seeger, Rolf Harris in The Beatles.
