Plasma growth hormone concentrations in cows before, during, and after parturition.

@article{Olsen1974PlasmaGH,
  title={Plasma growth hormone concentrations in cows before, during, and after parturition.},
  author={John Douglas Olsen and Allen H. Trenkle and D A Witzel and John S. McDonald},
  journal={American journal of veterinary research},
  year={1974},
  volume={35 8},
  pages={1131-4}
}