| The Olympic Mathematical Marathon. Grades 7-12. Volume 1 - Daniel Sitaru, George Apostolopoulos • librariadelfin.ro | 58.41 RON |
| The Olympic Mathematical Marathon Grades 7-12 Vol.1 - George Apostolopoulos, editura Cartea Romaneasca • esteto.ro | 69.00 RON |
| The Olympic Mathematical Marathon Grades 7-12 Vol.1 - George Apostolopoulos • libris.ro | 69.00 RON |
The Olympic Mathematical Marathon. Grades 7-12. Volume 1 - Daniel Sitaru, George Apostolopoulos