(3GdbGfhf GdOSJhQj hGdCfXeI GdSjGSjI (B/ s - (3SQMGd, CMeO s ((3UjOG, dHfGf (B:s (3OGQ GdQja, s, 1990)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B. s
Keywords: (3GdbGfhf GdOSJhQj s -- (3dHfGfs; (3fXe GdMce s -- (3dHfGf s; (3GdfXe GdSjGSjI s -- (3dHfGfs