Penicillin milk levels in cows following intramammary administration.

@article{Jackson1950PenicillinML,
  title={Penicillin milk levels in cows following intramammary administration.},
  author={W. Jackson and C S Bryan},
  journal={Veterinary medicine},
  year={1950},
  volume={45 10},
  pages={395-9}
}