000 00306nam a2200121Ia 4500
008 170101s1968 xx 000 0 und d
082 _a630 AME
100 _aAmerican Society of Agronomy
245 0 _aAdvances in Agronomy vol. 20
260 _bAcademic Press
_c1968
300 _a379 p
942 _2ddc
_cB
999 _c607616
_d607616