Nowell, Charles E., <br/><br/>
Portugal 
/ by Charles E. Nowell. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1973. 
 - xii, 178 pages, maps :  illustrations ;  22 cm. 
<br/><br/>Bibliography: page 169-173. 
<br/><br/><label>ISBN: </label>0136869157 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Portugal--History.