TY  - RPRT
TI  - Surveys to answer questions. Some methodological considerations.
AU  - M Rutter
PY  - 1982
DO  - 10.1111/j.1600-0447.1982.tb00895.x
UR  - https://pubmed.ncbi.nlm.nih.gov/6956201/
ID  - 6956201
ER  -