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Po njakoi vŭprosi na marksistko-leninskata teorija i praktika v Bŭlgarija : Sbornik statii
Mitev, Dimitǔr, (1964)
Regional development strategy in Southeast Europe. A comparative analysis of Albania, Bulgaria, Greece, Romania and Yugoslavia
Hoffman, George Walter, (1972)
Bulgarian economic development since World War II
Dobrin, Bogoslav, (1973)