author: Alissandrakis, Constantine_or_Andrikopoulos, Nikolaos_or_Grontas, Panagiotis_or_Pagourtzis, Aristeidis_or_Κοντογεώργης, Αριστείδης__elsubjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_II. NATURAL SCIENCES AND AGRICULTURAL SCIENCEScollection: 2lang: el