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Kimberly M. Carlson, James S. Gerber, Nathaniel D. Mueller, Mario Herrero, Graham K. MacDonald, Kate A. Brauman, Petr Havlik, Christine S. O’Connell, Justin A. Johnson, Sassan Saatchi, Paul C. West: Greenhouse gas emissions intensity of global croplands. In: Nature Climate Change. Band7, Nr.1, Januar 2017, ISSN1758-6798, S.63–68, doi:10.1038/nclimate3158.
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J. M. Leheska, L. D. Thompson, J. C. Howe, E. Hentges, J. Boyce, J. C. Brooks, B. Shriver, L. Hoover, M. F. Miller: Effects of conventional and grass-feeding systems on the nutrient composition of beef. In: Journal of Animal Science. Band86, Nr.12, Dezember 2008, ISSN1525-3163, S.3575–3585, doi:10.2527/jas.2007-0565, PMID 18641180.
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