(3GdeUGQa GdeJNUUI aj dHfGf h HYV GdOhd GdYQHjI h GdGhQhHjI (B/ s - (3SaQ, GMeOs ((3GJMGO GdeUGQa GdYQHjI,s, 1992)
Keywords: (3GdHfhcs; (3dHfGfs