TY  - RPRT
TI  - Ending polio immunization.
AU  - H F Hull
AU  - R B Aylward
PY  - 1997
DO  - 10.1126/science.277.5327.780
UR  - https://pubmed.ncbi.nlm.nih.gov/9273701/
ID  - 9273701
ER  -