World Book Encyclopedia: CD 1.
World Book Encyclopedia: CD 2.
The World Book encyclopedia. Volume 12., L.
The World Book encyclopedia. Volume 1., A.
The world book encyclopedia. Volume 1: A.
The world book encyclopedia. Volume 2: B.
The world book encyclopedia. Volume 3: C-Ch.
The world book encyclopedia. Volume 4: Ci-Cz.
The world book encyclopedia. Volume 5: D.
The world book encyclopedia. Volume 6: E.
The world book encyclopedia. Volume 7: F.
The world book encyclopedia. Volume 8: G.
The world book encyclopedia. Volume 9: H.
The world book encyclopedia. Volume 10: I.
The world book encyclopedia. Volume 11: J-K.
The world book encyclopedia. Volume 12: L.
The world book encyclopedia. Volume 13: M.
The world book encyclopedia. Volume 14: N-O.
The world book encyclopedia. Volume 15: P.
The world book encyclopedia. Volume 16: Q-R.