000 00322nam a2200121Ia 4500
008 140208s9999 xx 000 0 und d
020 _a00021962
044 _aU.S.A.
245 _aAgronomy Journal. v.62, 1970
_c
260 _bAmerican Society of Agronomy
_aWisconsin
_c1970
300 _av.62, 889 p.; 28cm.
942 _2udc
_cP
999 _c4516
_d4516