000 00380nam a2200133Ia 4500
008 100324s9999 xx 000 0 und d
100 _aFlichman G
245 _aInternational comparisons of efficiency in agricultural production
260 _c1990
_bO.E.C.D.
_aParis
366 _b1990
650 _aAgriculture
942 _cBK
999 _c75030
_d75030