@article{
  author = {samadzadeh, Rasoul, Azizzadeh, Seyed Saied, Ghasemi, Ahmad},
  title = {Geographical Distribution Gastrointestinal Cancer and its Relation with Soil 
Nitrate Rural Settlement (Case study: Ardabil County)},
  journal = {Journal of Studies of Human Settlements Planning},
  year = {2020},
  volume = {15},
  number = {1},
  pages = {67-83},
  doi = {}
}