(3GdJYUH (B:s (3eY ChVO GdESdGe h GdEfSGf h GddSGf deGPG h cja? (B/s - (3CMeO, Hf fYeGfs ((3GdLRGFQ (B:s (3efThQGJ OMdH ,s, 1991)
Keywords: (3GdESdGes; (3GdJYUHs; (3GdJYUH GdOjfj s; (3GdJYUH GdeSjMjs