(3GdeQCI GdeSdeI h abg GdOYhI Edi Gddg (B/ s - (3eMehO, Ydj YHO GdMdjes ((3GdefUhQg (B:s (3OGQ GdhaGA ddWHGYI hGdfTQ hGdJhRjY,s, 1991)
Keywords: (3GdeQCI GdeSdeIs