Driyono B, Nafkar Jaya M. Innovation Design of Digital Clinometer Papi (Precision Approach Path Indicator) Angle Measurer Instrument at Yogyakarta Adisutjipto International Airport. ajtk [Internet]. 2020 Jun. 30 [cited 2024 Nov. 22];3(1):88-95. Available from: https://jurnal.poltekbangmakassar.ac.id/index.php/airman/article/view/160