(3GdQjGVjGJ GdYGeI h JWHbGJgG GdGbJUGOjIs - (3YOfGf(B, (3YhVs ((3YeGf(B:s (3OGQ GdaQbGf(B,s, 1991)
Keywords: (3JaGVd hJcGeds; (3QjGVjGJ GbJUGOjIs; (3QjGVjGJ JMdjdjIs