The modern encyclopedia : A-K (Vol.1) /

Ижил төстэй зүйлс

• The modern encyclopedia : L-Z (Vol.2) /
  Хэвлэсэн: (1992)
• The 1977 world book year book. : the annual supplement to the world book encyclopedia.
  Хэвлэсэн: (1977)
• The 1978 world book year book. : the annual supplement to the world book encyclopedia.
  Хэвлэсэн: (1978)
• The 1979 world book year book. : the annual supplement to the world book encyclopedia.
  Хэвлэсэн: (1979)
• The 1981 world book year book. : the annual supplement to the world book encyclopedia.
  Хэвлэсэн: (1981)