Forestry Country Profiles - The forestry country profiles provide detailed information on forests and the forest sector: forest cover (types, extent and change), forest management, policies, products and trade, and more - in all some 30 pages for each country in the world.

Forests, Grasslands and Drylands - From EarthTrends: The Environmental Information Portal of the World Resources Institute.

Diversity of tree species

Ministry of Agriculture and Food - Republic of Bulgaria