The Population Bomb
Paul R. Ehrlich
The Linear Algebra Survival Guide: Illustrated with Mathematica®
Fred Szabo
Play, Dreams and Imitation in Childhood
Jean Piaget
Society and Language Use
Jef Verschueren & Jürgen Jaspers & Jan-Ola Östman
The Universe Speaks in Numbers
Graham Farmelo
Nikola Tesla und sein Werk
Slavko Boksan