TY - CHAP A1 - Blumenstock, J.E. A1 - Gillick, D. A1 - Eagle, N. T1 - Who’s calling? Demographics of mobile phone use in Rwanda Y1 - 2010 A3 - Eagle, N. A3 - Horvitz, E. T2 - AAAI Spring Symposium: Artificial Intelligence for Development 2010 CY - Menlo Park PB - AAAI Press ER -