TY  - BOOK
AU  - Walker,J.C.
TI  - Plant pathology
AV  - SB731 .W235
U1  - 581.2 
PY  - 1950///
CY  - New York
PB  - McGraw-Hill
KW  - Plant diseases
KW  - Vegetable pathology
N1  - Includes bibliographies
ER  -