000 00316nam a2200133Ia 4500
008 130225s9999 xx 000 0 und d
100 _aDavidson, J.B.
245 _aConcrete fence posts
260 _aAmes
_c1924
300 _a18-44 p.
440 _aIowa Agricultural Experiment
901 _a21756
942 _cB
_2udc
999 _c3620
_d3620