Jürgen Fröhlich Author & Editor

Prof. Dr. Helmut König, Johannes Gutenberg University, Inst. Microbiology and Wine Research,Mainz, Germany Dr. Jürgen Fröhlich,Erbslöh Geisenheim AG,Geisenheim,Germany Prof. Dr. Gottfried Unden,Johannes Gutenberg University, Inst. Microbiology and Wine Research,Mainz, Germany