RT - Journal Article T1 - 6 JF - jsci YR - 1993 JO - jsci VO - 1372 IS - 5 UR - http://jsci.khu.ac.ir/article-1-1283-en.html SP - 0 EP - 0 K1 - 6 AB - 6 LA eng UL http://jsci.khu.ac.ir/article-1-1283-en.html M3 ER -