TY  - BOOK
ED  -  Royal show International symposium 
ED  -  The Royal International Agricultural Exhibition.
TI  -  Towards sustainable crop production systems emerging technologies, 1 st to 7th July, 1992
U1  -  338.1 TOW 
PY  - 1992///
CY  -  London : 
PB  -  The Royal International Agricultural Exhibition, 
KW  -  Cropping systems
N1  -  Includes bibliographical references
ER  -