TY  - SER
AU  - Hart, Helen and others,
TI  - Phytopathology Vol. 39(1-12)
U1  - 632 
PY  - 1949///
CY  - Lancaster
PB  - American Phytopathological Society
KW  - Phytopathology
KW  - Plant injuries, diseases & pests
KW  - Plant Pathology
ER  -