000			00390nam a2200133Ia 4500
008			220204s9999 xx 000 0 und d
082			_a631.147 _bOEL
100			_aOELHAF, Robert C
245		0	_aOrganic agriculture: Economic and ecological comparisons with conventional methods.
260			_aNew Jersey _bAllanheld _c1978
650			_aAgriculture
650			_aPest control
942			_cBK
999			_c31405 _d31405