http://pec.lib.wvu.edu/record/P177641943A Differential medium for the isolation of Phytomonas sepedonica.Journal article reprint from: <em>Phytopathology</em>, v.33:no.5 (1943:May).Lowther, C. V.Marten, E. A.Leach, J. G. (Julian Gilbert), b. 1894.Potato ring rot.14256