(3UhQ ef GdJQGK GdCQOfj GdadSWjfj (B/ s - (3HcL, EQSdGf QeVGfs ((3EfLdJQG (B:s (3hjSJQ gGe,s, 1981)
Keywords: (3GdJQGKs; (3GdghjI GdKbGajIs; (3GdUhQs; (3GdUhQ GdahJhZQGajIs