TY - JOUR JF - jsci JO - VL - 1374 IS - 8 PY - 1996 Y1 - 1996/6/01 TI - 11 TT - 11 N2 - 11 SP - 0 EP - 0 AD - KW - 11 UR - http://jsci.khu.ac.ir/article-1-1314-en.html ER -