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- [7] CRUDE EXOPOLYSACCHARIDES (EPS) FROM XANTHOMONAS-CAMPESTRIS PV MANIHOTIS, XANTHOMONAS-CAMPESTRIS PV CAMPESTRIS AND COMMERCIAL XANTHAN GUM AS INDUCERS OF PROTECTION IN COFFEE PLANTS AGAINST HEMILEIA VASTATRIX JOURNAL OF PHYTOPATHOLOGY-PHYTOPATHOLOGISCHE ZEITSCHRIFT, 1993, 139 (02): : 119 - 128