000 00292nam a2200121Ia 4500
008 230108s9999 xx 000 0 und d
245 0 _aAgronomy Journal Vol-83 (1-3)
260 _bAmerican Society of Agronomy
260 _c1991
365 _bGratis
650 _aBack Volume
942 _cBK
999 _c258126
_d258126