MERRIAM-WEBSTER MAP AT http://www.merriam-webster.com/cgi-bin/nytmaps.pl?bulgaria
WORLDATLAS MAP AT http://www.worldatlas.com/webimage/countrys/europe/bg.htm
COUNTRY INFORMATION http://en.wikipedia.org/wiki/Bulgaria
OPERATION WORLD http://www.operationworld.org/country/bulg/owtext.html
JOSHUA PROJECT http://www.joshuaproject.net/countries.php?rog3=BU
LIST OF CITIES IN BULGARIA http://en.wikipedia.org/wiki/List_of_cities_and_towns_in_Bulgaria
http://en.wikipedia.org/wiki/Sofia
From: http://en.wikipedia.org/wiki/Sofia