References

CIA -The World Factbook 1999

Microsoft® Encarta® Encyclopedia 2000

Encyclopedia Britannica, © 1999-2000 Britannica.com Inc.

International Constitutional Law (ICL), 1994 - 13 April 2000, University of Wuerzburg,
http://www.uni-wuerzburg.de/law/info.html

Website of the Library of Congress, Country studies, Portugal (Data as of January 1993),
http://lcweb2.loc.gov/frd/cs/

Website Mercator Linguistic Law and Legislation,
http://www.troc.es/ciemen/mercator/index-gb.htm

Euromosaic Report on Portugal, (produced by the Institut de Sociolingüística Catalana (Barcelona), Centre de Recherche sur le plurilinguisme (Brussels), and Research Centre Wales (Bangor)),
http://www.uoc.es/euromosaic/web/homean/index1.html

Website of Perry-Castañeda Library, Map Collection, The University of Texas at Austin
http://www.lib.utexas.edu/Libs/PCL/Map_collection/Map_collection.html