000 00321nam a2200121Ia 4500
008 140317s9999 xx 000 0 und d
082 _a633
100 _aBear,Firman E.
245 _aHunger signs in crops : a symposium.
260 _aWashington
_bD.C. American Society of Agronomy.
_c1951
300 _a390
942 _2ddc
_cBK
999 _c255
_d255