RT - Journal Article T1 - JF - jgs YR - 2013 JO - jgs VO - 12 IS - 27 UR - http://jgs.khu.ac.ir/article-1-1654-fa.html SP - 3 EP - 14 AB - LA eng UL http://jgs.khu.ac.ir/article-1-1654-fa.html M3 ER -