collection: 2author: Karkalousos, Petros_or_Zoi, Georgiou_or_Spyropoulos, Vasileios_or_������������, ����������������__elsubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCES_or_III. ENGINEERING AND TECHNOLOGYlang: el