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Έκδοση 2000
Full text available from Engineering Database: 03/01/1998 to present
Full text available from Advanced Technologies & Aerospace Database: Spring 2000 to present
Full text available from Career & Technical Education Database: Spring 2000 to present
Full text available from Military Database: Spring 2000 to present
Κυβερνητικό Έγγραφο Ηλεκτρονική πηγή Επιστημονικό περιοδικό