TY  - RPRT
TI  - Sampling for evaluation. Issues and strategies for community-based HIV prevention programs.
AU  - A A O'Connell
PY  - 2000
DO  - 10.1177/016327870002300206
UR  - https://pubmed.ncbi.nlm.nih.gov/10947526/
ID  - 10947526
ER  -