000 00313nam a2200145 4500
082 _a338.1 OPE
100 _a
245 _aOpen university: Agriculure
250 _a
260 _aMilton Keynes
_bOpen University Press
_c1975
300 _a
490 _a
650 _aAgricultural economics
942 _cBK
999 _c587156
_d587156