@article{
  author = {Amani  Firoozabad, esmaiil, Hassanpour, Ali, ganj khanloo, amir, Dolatabadi, Abdollah},
  title = {Comparison of serum beta-carotene and vitamin A levels in sheep of Khalkhal region in open and closed breeding system},
  journal = {Veterinary Clinical Pathology The Quarterly Scientific Journal},
  year = {2020},
  volume = {14},
  number = {54},
  pages = {185-193},
  doi = {10.30495/jvcp.2020.515131.1261}
}