@article{
  author = {Shemshad, masoomeh, Malekmohamadi, iraj, Hoseininia, gholam hossein, Mirdamadi, seyed mehdi},
  title = {Study of Ecotourism Development Measuring in Natural Resources Cooperatives and Effective Factors on it in Golestan Province},
  journal = {Human & Environment},
  year = {2009},
  volume = {7},
  number = {21},
  pages = {67-75},
  doi = {}
}