000 00410nam a2200133Ia 4500
008 130225s9999 xx 000 0 und d
100 _aPennsylvania Agricultural Experiment Station
245 _aTobacco seedbed management
260 _aPennsylvania
_bPennsylvania Agricultural Experiment Station
_c1956
300 _a0.833333333
440 _aNo. 462; Pennsylvania Agricul
901 _a50357
942 _cB
_2udc
999 _c8898
_d8898