Schwab, O. G. Frevert, R. K. Edminster, T. W. Barnes, K. K. <br/><br/>
Soil and water conservation engineering 

 - third 
 - john Willey & sons  U.S.A  1955 
 - 525p.  fig., table, chart, ill. 
<br/><br/><label>Nat. Bib. No.: </label>5380 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Universal Decimal Class. No.: </label>631.4  / SOI