C. K. · Christian Keitel · Christine Keitel · Christine Keitel-Kreidt
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Learning from Computers: Mathematics Education and Technology | 978-3-540-57277-0 (3-540-57277-5) | 1993 | K. Ruthven |
| Mathematics Classrooms in Twelve Countries: The Insider's Perspective | 978-90-77874-95-0 (90-77874-95-X) | 2006 | D. Clarke · Y. Shimizu |