@misc{indiciaead92759710ef,
  title = {A direct complement fixation test for infectious bronchitis virus using heat-inactivated chicken sera.},
  author = {C D Bracewell},
  year = {1973},
  doi = {10.1136/vr.92.17.452},
  url = {https://pubmed.ncbi.nlm.nih.gov/4722792/},
  note = {Source identifier: 4722792}
}