CIA World Factbook: Bulgaria
- Features a map and brief descriptions of geography, economy, government, and people.
- https://www.cia.gov/library/publications/the-world-factbook/geos/bu.html

Wonderland Bulgaria
- Contains history, ethnography and folklore, cuisine, and a look at the people of Bulgaria.
- http://www.omda.bg/indexa.htm

Bulgaria - A Country Study
- Overview of life, history, and culture by the US Library of Congress.
- http://lcweb2.loc.gov/frd/cs/bgtoc.html