AU  - Horsfall G.James
AU  - Cowling B.Ellis
TI  - Plant disease an advanced treatise : Vol.2  How disease develops in populations / 
U1  - 632 
PY  - 1978///
CY  - New York.
PB  - Academic press.
KW  - Plant injuries diseases pests in crop production
KW  - Plant disease
ER  -