TY - JOUR T1 - 5 TT - 5 JF - jsci JO - jsci VL - 1356 IS - 2 UR - http://jsci.khu.ac.ir/article-1-1250-fa.html Y1 - 1977 SP - 0 EP - 0 KW - 5 N2 - 5 M3 ER -