Vries  E.W.T. Penning de <br/><br/>
Soil Erosion  At  Multiple  Scales  Principles  and  Methods  For  Assessing  Causes and Impacts 

 - Wallingford, Oxon UK  CAB International  1998 
 -  390.P;pic;ill 
<br/><br/><label>ISBN: </label>0851992900 
<br/><br/><label>Universal Decimal Class. No.: </label>631.4  / DOA