TY  - RPRT
TI  - Sampling and screening problems in a rheumatic heart disease case-finding study.
AU  - E A GEHAN
PY  - 1958
DO  - 10.2105/ajph.48.10.1335
UR  - https://pubmed.ncbi.nlm.nih.gov/13583276/
ID  - 13583276
ER  -