Dedman, Stephen. GURPS Dinosaurs, Steve Jackson Games.
Rules updates on Ice Age characters; some bestiary references.
Walking with the Prehistoric Beasts. Produced by the BBC.
Behaviour and attitudes of prehistoric man; prehistoric animals.
Walking with the Cavemen. Produced by the BBC.
Behaviour and attitudes of prehistoric man.
Wilson Tate, Kirk. GURPS Ice Age, Steve Jackson Games.
General background; events derived from Wolf Pack on Bear River adventure.