On the development of mathematics in the People's Republic of Bulgaria

Ижил төстэй зүйлс

• Economic development of the People's Republic of Bulgaria and socialist integration
  -н: Tsarevski N.
  Хэвлэсэн: (1977)
• The turkish minority the people's republic of bulgaria
  Хэвлэсэн: (1951)
• The working youth of People's Republic of Bulgaria
  Хэвлэсэн: (1948)
• Protected natural sites in the people's republic of Bulgaria
  Хэвлэсэн: (1981)
• Social and political development in the people's republic of Macedonia
  -н: Kolisevski L.
  Хэвлэсэн: (1959)