1. How Representative Are SMS Surveys in Africa? Experimental Evidence From Four Countries. (13th April 2018) Authors: Lau, Charles Q; Lombaard, Ansie; Baker, Melissa; Eyerman, Joe; Thalji, Lisa Journal: International journal of public opinion research Issue: Volume 31:Number 2(2019) Page Start: 309 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Questionnaire Design in Short Message Service (SMS) Surveys. Issue 3 (August 2019) Authors: Lau, Charles Q.; Sanders, Herschel; Lombaard, Ansie Journal: Field methods Issue: Volume 31:Issue 3(2019) Page Start: 214 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗