TY  - RPRT
TI  - Screening for stratification in two-phase ('two-stage') epidemiological surveys.
AU  - A Pickles
AU  - G Dunn
AU  - J L Vázquez-Barquero
PY  - 1995
DO  - 10.1177/096228029500400106
UR  - https://pubmed.ncbi.nlm.nih.gov/7613639/
ID  - 7613639
ER  -