//-->
Foreign trade of the Peopleʹs Republic of Bulgaria : Statistic survey ; 1939-1968
(1970)
Vutrešna turgovija : Narodna Republika Bulgarija; Ministerstvo na Informacijata i S'ubsčenijata; Centralno Statističesko Upravlenie
(1972)
Bulgaria: Index of government services, trade, banking and insurance, and communal services 1939 and 1948-1965
Lazarcik, Gregor, (1968)