@misc{indiciae0c3a74857021,
  title = {Charge differences between human IgG isoantibodies associated with specificity.},
  author = {M Frame and P L Mollison},
  year = {1969},
  url = {https://pubmed.ncbi.nlm.nih.gov/4976940/},
  note = {Source identifier: 4976940}
}