@article{
  author = {Madanipour Kermanshahi, Morteza, Karamali, Leila},
  title = {Evaluating Efficiency of Forest-Trees Felling Motor-Manual Groups Using Data Envelopment Analysis Method in West of Mazandaran Province},
  journal = {Journal of  Renewable Natural Resources Research},
  year = {2018},
  volume = {8},
  number = {2},
  pages = {1-18},
  doi = {}
}