@misc{indiciae605867603bfe,
  title = {An improved antigen for the paratuberculosis complement fixation test.},
  author = {J A Morris and A E Stevens},
  year = {1977},
  doi = {10.1016/s0092-1157(77)80017-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/925040/},
  note = {Source identifier: 925040}
}