Saputro, W. A. and Suryawinata, M. . (2021) “Online Survey Application System Design Via Telegram at the Bsa Project Surabaya Company: Rancang Bangun Sistem Aplikasi Survei Online Via Telegram Pada Perusahaan Bsa Project Surabaya”, Procedia of Engineering and Life Science, 1(1). doi: 10.21070/pels.v1i1.759.