RT - Journal Article T1 - 12 JF - jsci YR - 1996 JO - jsci VO - 1375 IS - 9 UR - http://jsci.khu.ac.ir/article-1-1326-fa.html SP - 0 EP - 0 K1 - 12 AB - 12 LA eng UL http://jsci.khu.ac.ir/article-1-1326-fa.html M3 ER -