@article{
  author = {Mazinani, Z., Aminafshar, M., Asgharzadeh, A., Chamani, M.},
  title = {Different Methods for Isolation and Preliminary Identification of Azotobacter},
  journal = {International  Journal of Agricultural Science and Research},
  year = {2012},
  volume = {3},
  number = {1},
  pages = {1-80},
  doi = {}
}