(3Odjd GdefThQGJ (B/s - (3fjGHI QFGSI GdLGeYI ddJNWjW h GdJhLjg h GdEYdGe s ([(3Ohf ecGf(B] :s (3LGeYI GdLRGFQ ,s, 1992)
Keywords: (3Odjd s; (3efThQGJ s