TY - Generic T1 - A systems approach for detecting sources of Phytophthora contamination in nurseries T2 - Sudden oak death fourth science symposium Y1 - 2010 A1 - Parke, J. L. A1 - N. J. Grünwald A1 - C. Lewis A1 - V. Fieland ED - Frankel, S.J. ED - J.T. Kliejunas ED - K. M. Palmieri JF - Sudden oak death fourth science symposium CY - Santa Cruz, California VL - Gen. Tech. Rep. PSW-GTR-229 UR - http://www.fs.fed.us/psw/publications/documents/psw_gtr229/ ER -