Managing planet earth  Readings    

 - New York  Longman Publishers U S A       1990 
 - vi,146p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomorphology
<br/><br/><label>Dewey Class. No.: </label>U211, N0