@article{
  author = {seifouri, vida, Babalhavaeji, fahimeh, Nooshinfard, Fatemeh, Matlabi, Dariush},
  title = {Comparison of the Application of Econometric Methods in Economic Valuation
Library Services},
  journal = {Journal of Knowledge Studies},
  year = {2019},
  volume = {12},
  number = {44},
  pages = {14-31},
  doi = {}
}