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Verfassung der Volksrepublik Bulgarien
Eckstein, Eva, (1960)
Konstitucija i osnovnye zakonodatel'nye akty Narodnoj Republiki Bolgarii
Lazareva, M. I., (1952)
Constitution of the People's Republic Bulgaria, approved by the Grand Nat. Ass. on Dec. 4, 1947
(1947)