RT - Journal Article T1 - JF - safinahjrn YR - 2020 JO - safinahjrn VO - 18 IS - 69 UR - http://safinahmagazine.ir/article-1-189-fa.html SP - 1 EP - 4 AB - LA eng UL http://safinahmagazine.ir/article-1-189-fa.html M3 ER -