Questionnaires are a popular exploration tool that experimenters have employed for decades. It’s a data collection system that involves asking a set of standardized questions to a sample population.

Perinatal Mortality Survey SA/NBT/M Questionnaires and Tabulations SA/NBT/M.6 Questionnaires SA/NBT/M.6/1 Questionnaires: drafts with members' comments and sample of final versions for pilot survey, ...