(3aSjhdhLjG LSe GdEfSGf (B/ s - (3aQjMGJ, MceJ YHO GdcQjes ((3YeGf (B:s (3OGQ GdKbGaI ddfTQ h GdJhRjY,s, 1990)
Keywords: (3GdaSjhdhLjGs