Williams,Martin <br/><br/>
When the Sahara was green:  How our greatest desert came to be 
Martin Williams 
 - NewJersey  Princeton University Press  2021 
<br/><br/><label>ISBN: </label>9780691201627 
<br/><br/><label>Dewey Class. No.: </label>556 WIL.W  / GEO5571