@article{article78,
  title = {Menstrual Cycle Patterns of College Students in Gorgan–Northeast of Iran: Identify Its Association with Sociodemographic Factors},
  author = {Gharravi, A.M.},
  journal = {Journal of Clinical Practice and Research},
  year = {2009},
  volume = {31},
  pages = {331-338},
  doi = {}
}