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What was the German sugar cartel? : An analysis of interest group representation and industrial organization, 1850 - 1934
Vascik, George S., (1990)
Germany's food can it last? : Germany's food and England's plan to starve her out ; a study by German experts
Eltzbacher, Paul, (1915)
Geschichte der deutschen Nahrungs- und Genußmittelindustrie 1750 - 1914
Ellerbrock, Karl-Peter, (1993)