(3EJMGa GdSGFd HeG daGWeg ef GdefGbH (B: s (3SjOI fSGA Cgd GdLfI (B:(3aGWeg GdRgQGA (B/ s - (3GdefGhj, Rjf GdOjf eMeO YHO GdQDhas; (3YGThQ, YHO GddWjas ((3GdbGgQg (B:s (3ecJHI GdbQBf ddWHY h GdfTQ h GdJhRjY,s, 1987)
Keywords: (3GdESdGes; (3GdMOjK GdTQjas