Sveitsi ja Basel

http://fi.wikipedia.org/wiki/Basel

http://europeforvisitors.com/switzaustria/articles/basel.htm

http://wikitravel.org/en/Basel

http://www.swissworld.org/en/geography/towns/basel/ 

http://www.basel.com/fr.cfm/baselinfo/broschueren/offer-BaselInfoBT-Broschueren-244925.html

http://www.basel.ch/fr/kultur/museen.htm

http://www.linternaute.com/voyage/suisse/bale/

http://www.basel.com/fr.cfm/sightseeing/