000			00316nam a2200133Ia 4500
008			230108s9999 xx 000 0 und d
100			_a"Hurd R.G. etc., ed."
245		0	_aOpportunities for Increasing Crop Yields
260			_bPitman
260			_c1980
365			_b492.50
650			_aAgronomy
942			_cBK
999			_c238938 _d238938