000 00342nam a2200133Ia 4500
008 130223s9999 xx 000 0 und d
100 _aJohnson, M.W.
245 _a1969 Pennsylvania corn performance studies
260 _aPennsylvania
260 _c1970
440 _aNo. 304; Pennsylvania Agricult
901 _pS17579
942 _cB
_2udc
999 _c151593
_d151593