000 00271nam a22001217a 4500
040 _cHS
082 _a630 COL 2000 C278
100 _aM. COLLINSON
245 _aA history of farming systems research
260 _aUK
_bM. COLLINSON
_c2000
300 _a432p;
942 _cEK
999 _c11244
_d11244