RT - Journal Article T1 - هت JF - jsci YR - 2001 JO - jsci VO - 18 IS - 54 UR - http://jsci.khu.ac.ir/article-1-1112-en.html SP - 0 EP - 0 K1 - ل AB - ع LA eng UL http://jsci.khu.ac.ir/article-1-1112-en.html M3 ER -