Azzaki, A. D.; Hariyadi, S.; Dewi Kusumayati, L. EVALUATION OF THE NEED FOR BTT (BAGGAGE TOWING TRACTOR) FOR GROUND HANDLING OPERATIONS AT DJALALUDDIN GORONTALO AIRPORT. Int. Conf. Adv. Transp. Eng. Appl. Soc. Sci. 2024, 3.