TY  - RPRT
TI  - Survey and sample: statistical pitfalls.
AU  - E LEWIS-FANING
PY  - 1951
DO  - 10.1016/s0033-3506(50)80217-2
UR  - https://pubmed.ncbi.nlm.nih.gov/14875829/
ID  - 14875829
ER  -