(3JNWjW gLQI GdYeGdI GdeUQjI ef GdJNUUGJ GdfGOQI (B/ s - (3efi bGSes; (3efi GdSYjOs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1987)
Keywords: (3eUQs; (3GdGLhQs; (3YbhO GdYeds; (3GdgLQGJs; (3GdYeGd GdegGLQhfs