Lal, Rattan2019-09-032019-09-032007Lal, Rattan. There Is No Such Thing as a Free Biofuel from Crop Residues / R. Lal // CSA News. – 2007. – Vol. 52 (nr. 5). – P. 12.enAttribution-NonCommercial-NoDerivatives 4.0 InternationalBioenergieBiocombustibilArticle