000 00339nam a2200133Ia 4500
008 130225s9999 xx 000 0 und d
100 _aBjorka, Knute
245 _aInternational trade in pork and pork products
260 _aIowa
_c1930
300 _a4-54 p.
440 _aIowa Agricultural Experiment
901 _a21960
942 _cB
_2udc
999 _c3747
_d3747