Pellucidar
Edgar Rice Burroughs
Pellucidar (2)
Tanar of Pellucidar
Pellucidar (3)
Back to the Stone Age
Pellucidar (5)
Tarzan at the Earth's Core
Pellucidar (4)
At the Earth's Core/Pellucidar/T[..] of Pellucidar
Pellucidar (1)
At the Earth's Core