(3gd fMf HdG fXjQ(B: (3YGde jSJcTa GdPcGA GdaQjO ddYbd GdHTQjs - James Trefil; (3djdi GdehShjs ((3GdchjJs (3GdeLdS GdhWfj ddKbGaI hGdafhf hGdBOGH HGdchjJs, 2006)
Keywords: Applied Sciences (3GdYdhe GdJWHjbjIs; General