@misc{indiciae12a432e90936,
  title = {A better system for polio vaccination in developing countries?},
  author = {W Ehrengut},
  year = {1980},
  doi = {10.1136/bmj.281.6246.1004-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/7427524/},
  note = {Source identifier: 7427524}
}