Proceedings of the Third International Conference on Mathematics Textbook Research and Development: 16-19 September 2019 Paderborn, Germany
S. Rezat, L. Fan, M. Hattermann, J. Schumacher, H. Wuschke, eds., Proceedings of the Third International Conference on Mathematics Textbook Research and Development: 16-19 September 2019 Paderborn, Germany, Universitätsbibliothek Paderborn, Paderborn, 2019.