000 00351nam a2200121Ia 45e0
008 180110s1949 xx 000 0 und d
082 _a630
100 _aBear, Firman E et al
245 0 _aHunger Signs in Crops
260 _aWashington
_bThe American Society of Agronomy
_c1949
300 _axvi, 390p;
942 _2ddc
_cBK
999 _c2158
_d2158