(3GdeONd ddOQGSI HcdjGJ GdJQHjI (B((3OQGSI JQHhjI JfXjejI(B) / s - (3aDGO HSjhfi eJhdis ([S.N] : (3OGQ GdeYQaI GdLGeYjI , s, 1991)
Keywords: (3GdJYdjes; (3GdJYdje GdYGdis; (3GdJYdje GdLGeYis; (3GdLGeYGJ hGdcdjGJs