TY  - BOOK
AU  - Tivy, Joy
TI  - Agricultural ecology
SN  - 058230163 7
U1  - 631 
PY  - 1990///
CY  - England
PB  - Longman scientific and technical 
KW  - Specific techniques
KW  - apparatus, equipment, material -
N1  - Includes bibliography and index
ER  -