TY  - RPRT
TI  - Poliomyelitis in developing countries.
AU  - C L Crawford
AU  - M J Hobbs
PY  - 1992
DO  - 10.1136/bmj.305.6851.475-c
UR  - https://pubmed.ncbi.nlm.nih.gov/1392976/
ID  - 1392976
ER  -