TY - BOOK AU - Walker,J.C. TI - Plant pathology U1 - 581.2 PY - 1957/// CY - New York PB - McGraw-Hill KW - Plant diseases N1 - includes index; 1. Introduction 2. History of plant pathology 3. Non parasitic diseases 4. Disease incited by plasmodiophorases 5. Disease incited by phycomycetes ER -