Sears, Paul Bigelow <br/><br/>
Deserts on the march 
Paul B. Sears. 
 - Norman  University of Oklahoma Press  c[1959]. 
 - 178 p.  ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0806116676  12.50 (ed. 1980) 
<br/><br/><label>LCCN: </label>91006721  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Man--Influence on nature--United States.<br/>Conservation of natural resources--United States.<br/>Agricultural ecology--United States.<br/>Desertification--United States.
<br/><br/><label>LC Class. No.: </label>GF503  / .S42 1959 
<br/><br/><label>Dewey Class. No.: </label>333.7/2/0973