000			00304cam a2200121ua 4500
082			_a631.45 _bSCH/SO
100			_aSchwab, Glenno .
245			_aSoil and water conservation engineering /
260			_aLondon : _bJohn Wiley & Sons , _c1981.
300			_a525 ; .
500			_aReference **
942			_cBK
999			_c4869 _d4869