@misc{indiciaec61b98de0eed,
  title = {Ruby Gumdrop: OR teaching aid.},
  author = {D Schmich and M Booth-Dunn},
  year = {1981},
  doi = {10.1016/s0001-2092(07)63007-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/6908503/},
  note = {Source identifier: 6908503}
}