(3GdCSdhH GdJQHhj ddOYhI Edi Gddg aj GdYUQ GdMGVQ (B/s - (3GdNjGW, NGdO Hf YHO GdcQjes ((3LOI, GdSYhOjI (B:s (3OGQ GdeLJeY ddfTQ,s, 1991)
(3HHdjhLQGajI (B: (3U(B. 231-249.s
Keywords: (3GdJQHjI GdESdGejIs; (3GdOYhI GdESdGejIs