RT - Journal Article T1 - JF - jgs YR - 2013 JO - jgs VO - 13 IS - 30 UR - http://jgs.khu.ac.ir/article-1-1651-fa.html SP - 3 EP - 15 AB - LA eng UL http://jgs.khu.ac.ir/article-1-1651-fa.html M3 ER -