Young, Anthony. <br/><br/>
Slope development / 
by Anthony Young and Doreen M. Young. 
 - 2nd ed. 
 - London :  Thomas Nelson,  1992. 
<br/><br/><label>ISBN: </label>0174481942 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Slopes (Physical geography).