(3chGQK WHjYjI (B/s ((3OeTb (B: s (3efThQGJ hRGQI GdKbGaI,s, 1989)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B. s
Keywords: (3GdchGQK GdWHjYjI s