Core

Journey to the Center of the Earth

Jules Verne

At the Earth's Core

Edgar Rice Burroughs

Pellucidar

Edgar Rice Burroughs.

Land of Terror: (#6) (Pellucidar, No 6)

Edgar Rice Burroughs

Journey to the Centre of the Earth

Jules Verne

Back to the Stone Age

Edgar Rice Burroughs

Introduction to the theory of cooperative games

Bezalel Peleg, Peter Sudhölter.

Magnetohydrodynamics and the earth's core: selected works of Paul Roberts

edited by Andrew Soward

Journey to the Center of the Earth

Frederick Amadeus Malleson, Rachel Perkins, Jules Verne, Ursula K. Heise

Core: a novel

by Paul Preuss.