Autor: Dumitru m batinetu giurgiu, 3 titluri

Olympiad Problems from all over the World. 7th Grade Content - Dumitru M. Batinetu-Giurgiu, Marin Chirciu, Octavian Stroe, Daniel Sitaru

Dumitru M. Batinetu Giurgiu,Marin Chirciu,Octavian Stroe,Daniel Sitaru

Olympiad Problems from all over the World. 8th Grade Content - Dumitru M. Batinetu-Giurgiu, Marin Chirciu, Octavian Stroe, Daniel Sitaru

Dumitru M. Batinetu Giurgiu,Marin Chirciu,Octavian Stroe,Daniel Sitaru

Olympiad Problems from all over the World. 9th Grade Content (lb. engleza) - Dumitru M. Batinetu-Giurgiu, Marin Chirciu, Daniel Sitaru, Neculai Stanci

Dumitru M. Batinetu Giurgiu,Marin Chirciu,Daniel Sitaru,Neculai Stanciu,Octavian Stroe