(3bVjI QhOjSjG (B: s (3Hjf GdGee GdeJMOI hefXeI GdhMOI GdGaQjbjI (B/s - (3Thbi YWG Gddg GdLeds ((3GdbGgQI (B: s (3GdecJHI GdYQHjI,s, 1977)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdefXeGJ GdOhdjIs