(3efgL GdCfHjGA aj GdOYhI Edi Gddg ajg GdMceI hGdYbd (B/s - (3GdeONdj, QHjY Hf gGOj,s 1351 (3gLQjG(B-s ((3GdchjJ (B:s (3GdOGQ GdSdajI,s, 1986)
Keywords: (3GdOYhI GdESdGejIs; (3bUU GdCfHjGAs