RT - Journal Article T1 - JF - jls YR - 2021 JO - jls VO - 8 IS - 21 UR - http://jls.khu.ac.ir/article-1-1974-fa.html SP - 1 EP - 6 AB - LA eng UL http://jls.khu.ac.ir/article-1-1974-fa.html M3 ER -