JULIANTO, A. M.; MATANARI, A. F.; KAREPESIAN, S. Y. R. A Optimization of Direction Finder in Disclosing Cases of Threatening By Jatanras Unit, Criminal Research Unit, Surabaya City Police Office. Tanggon Kosala, v. 13, n. 1, p. 20-31, 30 Apr. 2024.