TY  - RPRT
TI  - Difficulties in polio eradication.
AU  - O Razum
AU  - J Liyanage
AU  - K R Nayar
PY  - 2001
DO  - 10.1016/s0140-6736(05)71280-0
UR  - https://pubmed.ncbi.nlm.nih.gov/11273091/
ID  - 11273091
ER  -