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...Electronic journals....
Full text available from Advanced Technologies & Aerospace Database: 01/01/2003 to 03/31/2006
Full text available from Library Science Database: 01/01/2003 to 03/31/2006
Full text available from Research Library: 01/01/2003 to 03/31/2006
Ηλεκτρονική πηγή Επιστημονικό περιοδικό