000			00339nam a2200145Ia 4500
008			140317s9999 xx 000 0 und d
082			_a333.72
100			_aHawkes,J.G.
245			_aConservation and agriculture.
260			_aLondon _bDuckwerth _c1978
300			_a284
650			_aEconomics
653			_aEconomics
942			_2ddc _cBK
999			_c8863 _d8863