@misc{indiciaeaf68cac8216d,
  title = {Immunoglobulins in systemic scleroderma.},
  author = {S K Spencer and R K Winkelmann},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/4100587/},
  note = {Source identifier: 4100587}
}