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1. Statistical yearbook of the People's Republic of Bulgaria
   HA1621 .S7918 1956
2. Statisticheski godishnikʺ na Bŭlgarskoto T͡Sarstvo
   HA1621 .S792 1909
3. Statisticheski godishnikʺ na T͡Sarstvo Bŭlgarii͡a
   HA1621 .S792 1934
4. Statisticheski spravochnik na NR Bŭlgaria
   HA1621 .S795 1958
5. Statisticheski spravochnik
   HA1621 .S795 1970