@misc{indiciae7f739daac9b7,
  title = {Challenge infection as a means of determining the rate of disease resistant Trichomonas gallinae-free birds in a population},
  author = {R. M. Kocan and J.O. Knisley},
  year = {1970},
  doi = {10.7589/0090-3558-6.1.13},
  url = {https://pubs.usgs.gov/publication/5220522},
  note = {Source identifier: 5220522}
}