εκπαίδευση, γράφω άσκοπα, Ιστορικό, πρότυπο, σχεδιασμένο στο χέρι, φαντασιόπληκτος, σκίτσο, φόντο, επιστήμη, έρευνα, η φυσικη
Public Domain
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