RT - Journal Article T1 - سرمقاله JF - safinahjrn YR - 2021 JO - safinahjrn VO - 18 IS - 71 UR - http://safinahmagazine.ir/article-1-645-en.html SP - 5 EP - 9 AB - LA eng UL http://safinahmagazine.ir/article-1-645-en.html M3 ER -