(3habjO BNQ (B: s (3GdOGYjI GdESdGej GdcHjQ YHO GdHOjY UbQ ceG YQaJg (B/ s - (3bag, MjOQs ((3GdRQbGA (B:s (3ecJHI GdefGQ,s, 1989)
Keywords: (3GdESdGes; (3GdJQGLes