000			00335nam a2200133Ia 4500
008			140113s9999 xx 000 0 und d
082			_a631(047.1 K8.20
100			_a" Norman, A. G."
245			_aAdvances in agronomy v.20
260			_b"New York : Academic Press Inc, 1968"
300			_a379p.
650			_aAgronomy
942			_cBK
999			_c62649 _d62649