TY - JOUR A1 - Lau, C.Q. A1 - Cronberg, A. A1 - Marks, L. A1 - Amaya, A. T1 - In search of the optimal mode for mobile phone surveys in developing countries: A comparison of IVR, SMS, and CATI in Nigeria Y1 - 2019 DO - 10.18148/srm/2019.v13i3.7375 VL - 13 IS - 3 ER -