TY  - RPRT
TI  - Disease surveillance at district level: a model for developing countries.
AU  - T J John
AU  - R Samuel
AU  - V Balraj
AU  - R John
PY  - 1998
DO  - 10.1016/s0140-6736(97)10494-9
UR  - https://pubmed.ncbi.nlm.nih.gov/9800768/
ID  - 9800768
ER  -