TY  - BOOK
AU  - Cherrett J M ` Ed.
AU  -  Sagar G R Ed.
TI  - Origins of pest, parasite, disease and weed problems
T2  - British ecological society symposium; 17
U1  - J:4, L6 
PY  - 1976///
CY  - Oxford
PB  - Blackwell Scientific        
KW  -  Plant disease
KW  - Agriculture
ER  -