Shepard, Ward <br/><br/>
Food of famine :  the challenge of erosion. 

 - New York :  The MacMillan Company,  1946. 
 - 225 p. :  il. ;  20 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minería<br/>Erosión
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>622