books.google.bg - Now an Eastern European leader in the fields of science and technology, a nation with impressive renewable energy production capabilities and an extensive communication infrastructure, as well as a top exporter of minerals and metals, Bulgaria has grown both economically and politically over the past...http://books.google.bg/books/about/The_History_of_Bulgaria.html?hl=bg&id=gUcVrH0jcBAC&utm_source=gb-gplus-share“The” History of Bulgaria
