TY - JOUR A1 - Wesolowski, A. A1 - Eagle, N. A1 - Noor, A.M. A1 - Snow, R.W. A1 - Buckee, C.O. T1 - Heterogeneous mobile phone ownership and usage patterns in Kenya Y1 - 2012 DO - 10.1371/journal.pone.0035319 VL - 7 IS - 4 ER -