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Extensive Produktionsformen : Chancen zur Marktentlastung, Umweltsicherung und Einkommenskombination
Seibert, Otmar, (1986)
Mad cows and ailing hens : the transatlantic relationship and livestock diseases
O'Neill, Kate, (2009)
Animal welfare perception of the US public and cow-calf producers
McKendree, Melissa G. S., (2018)