(3GdahGQb GdbGfhfjI Hjf GdcaGM GdeSdM GdeQJHW HMb JbQjQ GdeUjQ hGdEQgGH GdOhdi (B/s - (3CMeO eMeO QaYJ ,s ((3GdchjJ (B:s (3GJMGO GdeMGejf GdYQH , s, 1987)
(3jTJed Ydi GQLGYGJ HHdjhLQGajI(B. s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdOhdj s; (3GdbGfhf GdLfGFi GdOhdis