TY  - RPRT
TI  - A better system for polio vaccination in developing countries?
AU  - T J John
AU  - A Joseph
AU  - P Vijayarathnam
PY  - 1980
DO  - 10.1136/bmj.281.6239.542
UR  - https://pubmed.ncbi.nlm.nih.gov/6253010/
ID  - 6253010
ER  -