Fortschritt Statt Stillstand! Ihr Schachbuch Für Schnelleren ErfolgMario Ziegler · First published 2021Open the Tome
Games of EmpiresKaren Aydin, Martina Ghosh-Schellhorn, Heinrich Schlange-Schöningen, Mario Ziegler · First published 2018Open the Tome
The Social sciences and international educationMario D. Zamora, Tomoko Hamada, Donald Ziegler, Laurie Paonessa · First published 1989Open the Tome
