000 00378nam a2200133Ia 4500
008 130225s9999 xx 000 0 und d
100 _aUnion of South Afirca, Department of Agriculture
245 _aMethod fo calculation of maize production cost
260 _aPretoria
_c1958
300 _a51 p.
440 _aNo. 359; Union of South Afric
901 _a57977
942 _cB
_2udc
999 _c9931
_d9931