Information and Communication Technology for Development for Africa Second International Conference, ICT4DA 2019, Bahir Dar, Ethiopia, May 28-30, 2019, Revised Selected Papers - Mekuria, Fisseha; Mekuria, Fisseha; Nigussie, Ethiopia; Nigussie, Ethiopia; Tegegne, Tesfa; Tegegne, Tesfa (Springer International Publishing : Imprint: Springer, 2019)