000 00243nam a2200097Ia 4500
008 220204s9999 xx 000 0 und d
082 _a631/635
_bADV.30
245 0 _aAdvances in agronomy. V 30
260 _aNew York
_bAcademic
_c1978
942 _cBK
999 _c36358
_d36358