000 00290nam a2200121Ia 4500
008 170101s1969 xx 000 0 und d
082 _a630 AME
100 _aAmerican Society of Agronomy
245 0 _aAdvances in Agronomy vol. 21
260 _c1969
300 _a340 p
942 _2ddc
_cB
999 _c727266
_d727266