(3GdbGfhf GdOSJhQj hGdfXe GdSjGSjI (B/s - (3GdZRGd, ESeGYjds ((3HjQhJ (B:s (3GdeDSSI GdLGeYjI ddOQGSGJ hGdfTQ hGdJhRjY,s, 1989)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdbGfhf GdOSJhQjs; (3GdfXe GdSjGSjIs; (3fXe GdMces