000 00342nam a2200145Ia 4500
008 130223s9999 xx 000 0 und d
100 _aHutchcroft, C.D.
245 _aIowa corn yield test
260 _aAmes
260 _c1962
300 _a24 p.
440 _aP-130; Iowa Agricultural Experimentr
901 _pS6763
942 _cB
_2udc
999 _c126027
_d126027