000 00317cam a2200121ua 4500
008 090428t||||||||||| 00 ||eng c
041 0 _aeng
100 0 _aTroch, Frederick R
245 1 0 _aSoil and water conservation for productivity and Environmental protection /
260 _c.
362 1 _a.
942 _c Dept. of ES
999 _c20738
_d20738