@article{
  author = {moradi, iraj, hariri, nadjla},
  title = {A Survey on the types of reference services of the central
 libraries of Islamic Azad University},
  journal = {Journal of Knowledge Studies},
  year = {2011},
  volume = {4},
  issue = {13},
  pages = {39-50},
  doi = {},
  url = {https://sanad.iau.ir/fa/Article/1040980}
}