(3JWhQ GdacQ GdSjGSi (B/s - (3YHO GdSdGe GdeRhZis; (3MHjH hQGYgs ((3GdbGgQI(B: s (3GdeQcR GdYGdei dOQGSGJ hGHMGK GdcJGH GdGNVQ ,s, 1990)
. 929-910 (3HHdjhLQGajG(B: (3UaMGJ(B.s
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(3GdfU HGddZI GdYQHjIs
Keywords: (3GdSjGSIs; (3GdbGfhf GdOSJhQjs