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Cold war in the Balkans : american foreign policy and the emergence of Communist Bulgaria, 1943-1947
Boll, Michael M., (1984)
Bulgaria i nejnite susedi, 1931-1939 : Političeski i diplomatičeski otnošenija
Mančev, Krustju, (1978)
Bulgarija na Balkanite 1944 - 1974 : bibliografija
Lazarov, Michail, (1975)