Sawyer, Donald. <br/><br/>
Frontier Expansion and Retraction in Brazil. 

 - Florida-U.S :   C.L.A.S,   1982. 
 - p. 2-3 
 - Irregular 
 - Vol. 17, no. 3 (May. 1982) 
 - Latinamericanist ;   no. 3 .
 - Univeristy of Florida. .
<br/><br/>Contiene: Amazon Ecology and Develpoment Potential. 
<br/><br/><br/>Inglés.