(3fXQjI GdfjGHI aj GdTQjYI hGdbGfhf (B/s - (3MeO, CMeOs ((3GdchjJ (B:s (3OGQ Gdbde,s, 1981)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
(3HHdjhLQGajI (B: (3U(B. 167-172.s
Keywords: (3GdfjGHI (B((3abg ESdGej(B)s; (3GdJhcjd (B((3bGfhf eOfj(B)s; (3GdJhcjd (B((3abg ESdGej(B)s