(3MhGQ GdNQSGf eY GdWQTGf (B((3eLehYI bUUjI(B) / s - (3eMeO eMehO GdZhds ([S.N] : (3OGQ YeGQ ddfTQ hGdJhRjY , s, 1993)
Keywords: (3GdbUU GdYQHjIs; (3GdeLehYGJs