TY  - BOOK
AU  - Cherrett,J.M.
AU  - Sagar,G.R.
TI  - Origins of pest, parasite, disease and weed problems : : the 18th Symposium of the British Ecological Society, Bangor, 12-14 April 1976 
SN  - 0632002263
PY  - 1977///
CY  - Oxford : 
PB  -  Blackwell Scientific Publications, 
KW  - Field crops
KW  - Diseases and pests
KW  - Congresses
KW  - Weeds
KW  - Veterinary medicine
N1  - Includes references and index
ER  -