TY - JOUR T1 - 5 TT - 5 JF - jsci JO - jsci VL - 1372 IS - 5 UR - http://jsci.khu.ac.ir/article-1-1282-en.html Y1 - 1993 SP - 0 EP - 0 KW - 5 N2 - 5 M3 ER -