(3GdfbhO hGdeUGQa ai GdfXGe GdGSdGei (B/s - (3Yha eMehO GdcaQGhjs ((3eUQ (B:s (3OGQ GdLGeYGJ GdeUQjI,s, 1987)
(3jTJed Ydi EQLGYGJ HHjdhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdGbJUGO GdESdGeis