@misc{indiciaee612b3a5915a,
  title = {Serologic languages and the A1-A2 blood groups.},
  author = {J Hirschfeld},
  year = {1976},
  doi = {10.1159/000231713},
  url = {https://pubmed.ncbi.nlm.nih.gov/1017899/},
  note = {Source identifier: 1017899}
}