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Schwerdtfeger, E. Greeting address to the participants by the president of the Deutsche Gesellschaft für Qualitätsforschung (Pflanzliche Nahrungsmittel) DGQ. Plant Food Hum Nutr 29, 3–4 (1979). https://doi.org/10.1007/BF02590260
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DOI: https://doi.org/10.1007/BF02590260