00271nam a22001217a 4500 HS 630 COL 2000 C278 M. COLLINSON A history of farming systems research UK M. COLLINSON 2000 432p; EK 11244 11244 0 0 0 630_000000000000000_COL_2000_C278 0 58676 LBC LBC C278 2017-02-24 630 COL 2000 C278 A07219 2017-02-24 2017-02-24 EK