(3YTQhf bUjOI aj GdRgO(B:s (3GdbSe GdKGfj ef (B"(3egdG jG LGeY GdOfjG (B" /s - (3CMeO , eMeO Hf GMeO SjO s ((3LOI, (B:s (3ecJHI GdShGOj ddJhRjY,s, 1989)
Keywords: (3GdTYQ GdYQHjs; (3GdRgOs