@misc{indiciae81922632f3b3,
  title = {New tuberculins.},
  author = {G Middlebrook and Z Reggiardo},
  year = {1970},
  doi = {10.3181/00379727-134-34789},
  url = {https://pubmed.ncbi.nlm.nih.gov/4316390/},
  note = {Source identifier: 4316390}
}