(3GdShOGf hKhQJge ai GdeOjfg GdefhQI (B145 (3g` (B\ 762 (3e (B/ s - (3UaGA MGaX YHOGdaJGMs ([S.N] : (3OGQ GdfgVI GdYQHjI , s, 1991)
Keywords: (3GdJGQjN GdGSdGeis; (3GdeOjfI GdefhQIs; (3ebGheI OGNdjIs