TY  - BOOK
AU  - COWLING,  Ellis B
AU  - HORSFALL, James G
TI  - Plant disease: An advanced treatise. V 2. How disease develops in population
U1  - 581.2 
PY  - 1977///
CY  - London
PB  - Academic
KW  - Emigrant pest
KW  - Plant disease
ER  -