(3GdRef hbjGSg (B/ s - (3S(B. (3,RGajdSci, a(B. s; (3GHQGgje eMehO ThTIs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1988)
Keywords: (3GdSGYGJs; (3GdJbGhjes; (3GdJhbjJs; (3bjGS GdPcGAs