Yuwono, Yuwono, and Mohammad Luay Murtadlo. 2017. “ANALISIS KETELITIAN AZIMUT PENGAMATAN MATAHARI DAN GLOBAL POSITIONING SYSTEM (GPS) (Studi Kasus : Kampus ITS Sukolilo, Surabaya)”. GEOID 13 (1):69-76. https://doi.org/10.12962/geoid.v13i1.1551.