Rico Yudhi Syaputra Simbolon, Abdul Mu’ti Sazali, Syahrul Aman. ANALISA PENGGUNAAN SECONDARY FREQUENCY TERHADAP PELAYANAN LALU LINTAS UDARA PADA UNIT FLIGHT SERVICE STATION (FSS) DI PERUM LPPNPI CABANG AMBON. SNITP [Internet]. 2022Sep.8 [cited 2024Nov.20];5(2). Available from: https://ejournal.poltekbangsby.ac.id/index.php/SNITP/article/view/1042