TY  - RPRT
TI  - Prophylactic immunization and poliomyelitis.
AU  - J LIEBEN
PY  - 1952
DO  - 10.1001/archpedi.1952.02040050024003
UR  - https://pubmed.ncbi.nlm.nih.gov/14884729/
ID  - 14884729
ER  -