MUHAMMAD FAHMI UMAR; SRI RAHAYU SURTININGTYAS; WISNU DARJONO TU. RANCANGAN SEKTOR GROUND CONTROL PADA UNIT AERODROME CONTROL TOWER (TWR) DI PERUM LPPNPI CABANG SEMARANG. Langit Biru: Jurnal Ilmiah Aviasi, indonesia, v. 12, n. 3, p. 83–90, 2019. DOI: 10.54147/langitbiru.v12i3.182. Disponível em: https://jurnal.overthinkingku.com/index.php/jurnal-ilmiah-aviasi/article/view/182. Acesso em: 15 may. 2026.