TY  - RPRT
TI  - Factors affecting response to postal questionnaires.
AU  - S Kaplan
AU  - P Cole
PY  - 1970
DO  - 10.1136/jech.24.4.245
UR  - https://pubmed.ncbi.nlm.nih.gov/5496532/
ID  - 5496532
ER  -