TY  - RPRT
TI  - Nonresponse in sample surveys: the problem and some solutions.
AU  - D R Brogan
PY  - 1980
DO  - 10.1093/ptj/60.8.1026
UR  - https://pubmed.ncbi.nlm.nih.gov/7403278/
ID  - 7403278
ER  -